Final answer:
The completed applications, additional materials, and fees for becoming a licensed real estate agent in Alabama must be submitted to the Alabama Real Estate Commission within 90 days of passing the examination.
Step-by-step explanation:
For individuals seeking to become licensed real estate agents in Alabama, the Alabama Real Estate Commission requires that all completed applications, supplementary materials, and associated fees be submitted within 90 days of passing the real estate examination. Therefore, the correct answer to the question is D. 90 days.