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

Actual exam question for US Green Building Council's LEED-AP-ID+C exam

Question #: 21
Topic #: 5

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?

A75% Rainforest Alliance Certified flooring with a total cost of $3,000 USD

B10% Rainforest Alliance Certified furniture with a total cost of $30,000 USD

C50% Rainforest Alliance Certified wood veneer with a total cost of $5,000 USD

D100% Rainforest Alliance Certified wheatboard with a total cost of $2,000 USD

Show Suggested Answer

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.

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

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Tiffiny

12 days ago

Haha, who even uses wheatboard these days? I'd go with the flooring option, it's more practical.

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Tesha

17 days ago

I agree, the wheatboard option seems to have the highest percentage of certified material.

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Jamie

23 days ago

Option D. 100% Rainforest Alliance Certified wheatboard with a total cost of $2,000 USD seems like the best choice here.

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Zita

28 days ago

I think the wheatboard option might be the best choice, but I need to double-check how the certification levels affect the credits.

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Beatriz

1 month 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.

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Xochitl

1 month 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.

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Nettie

1 month ago

I think the option with 100% certification might have the largest contribution, but I'm not entirely sure how the percentages weigh in.

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Roslyn

2 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.

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Dona

2 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.

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Mitzie

2 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?

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Yuette

2 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.

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Margot

2 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.

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