Salesforce Exam PDII Topic 2 Question 85 Discussion

The Salesforce admin et Cloud Kicks created a custom object called Region_c to store all postal zip codes in the United States and the Cloud Kicks sales region the zip code belongs to.

Cloud Kicks wants a trigger on the Lead to populate the Region based on the Lead's zip code.

Which code segment is the most efficient way to fulfill this request?

A)

B)

C)

D)