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US Green Building Council LEED-AP-ID+C Exam - Topic 5 Question 21 Discussion

Posted by Wayne on Jan 05, 2026 at 05:16 AM

Which material would have the largest contribution to Materials and Resources Credit, Building Product Disclosure and Optimization- Sourcing of Raw Materials, Option 2. Leadership Extraction Practices?

Suggested Answer: B

In the context of LEED AP ID+C V4, for the Building Product Disclosure and Optimization - Sourcing of Raw Materials, Option 2: Leadership Extraction Practices, the contribution is calculated based on the cost of the product and the percentage of certification. The furniture option, despite having a lower percentage of certification, has the highest total cost, which results in the largest contribution by cost to the credit.


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26 comments · newest first
PE
Pedro 6 months ago
True, but D's total contribution is solid with full certification.
CA
Carissa 6 months ago
But A has a higher percentage of certified material.
KA
Katlyn 6 months ago
Agreed! The cost is low too. Great value.
CO
Colton 6 months ago
I think D is the best choice. 100% certified is impressive.
RO
Rolande 6 months ago
C) is a solid option too, but A) might edge it out.
TH
Thurman 6 months ago
B) seems way too expensive for just 10% certified.
BE
Beatriz 7 months ago
Really? I thought cost would play a bigger role here.
WI
William 7 months ago
I think D) is the best choice! 100% certified is impressive.
CE
Cecilia 7 months ago
A) has the highest percentage of certified material.
CA
Catalina 7 months ago
Wheatboard? Really? That's so 90s. I'd go with the furniture option, it's more modern.
DA
Dahlia 7 months ago
Option C. 50% Rainforest Alliance Certified wood veneer is a good compromise between cost and certification.
TI
Tiffiny 8 months ago
Haha, who even uses wheatboard these days? I'd go with the flooring option, it's more practical.
TE
Tesha 8 months ago
I agree, the wheatboard option seems to have the highest percentage of certified material.
JA
Jamie 8 months ago
Option D. 100% Rainforest Alliance Certified wheatboard with a total cost of $2,000 USD seems like the best choice here.
ZI
Zita 8 months ago
I think the wheatboard option might be the best choice, but I need to double-check how the certification levels affect the credits.
BE
Beatriz 9 months ago
I feel like the flooring option could be significant since it's 75%, but I wonder if the total cost impacts the decision more than I thought.
XO
Xochitl 9 months ago
I remember a practice question where the total cost played a big role, but I can't recall if it was the only factor.
NE
Nettie 9 months ago
I think the option with 100% certification might have the largest contribution, but I'm not entirely sure how the percentages weigh in.
RO
Roslyn 9 months ago
I'm leaning towards option C. 50% Rainforest Alliance certified wood veneer with a total cost of $5,000 could be a good balance between the percentage of certified material and the overall cost.
DO
Dona 9 months ago
Based on the information provided, I think option D might be the best choice. 100% Rainforest Alliance certified wheatboard with a total cost of $2,000 seems like it would have the largest contribution to the credit.
MI
Mitzie 9 months ago
I'm a bit confused by the wording of the question. Does "largest contribution" mean the highest percentage of Rainforest Alliance certified material, or the highest total cost?
YU
Yuette 10 months ago
Okay, let me think this through. I need to identify which material would have the largest contribution to the credit. The key seems to be the Rainforest Alliance certification and the percentage of each material.
MA
Margot 10 months ago
Hmm, this seems like a tricky one. I'll need to carefully consider the details of the Materials and Resources Credit and the specific requirements for Option 2.
AD
Adell 4 months ago
↳ replying to Margot
D is 100%! That must count for something significant.
TE
Teddy 4 months ago
↳ replying to Margot
But B has a higher total cost. Maybe that matters more?
HU
Hui 5 months ago
↳ replying to Margot
I think A could be the best choice. 75% is a strong percentage.
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