Final answer:
There are over 30,000 TRICARE retail network pharmacies available to beneficiaries, providing extensive prescription drug coverage across the United States.
Step-by-step explanation:
The student has asked about the number of TRICARE retail network pharmacies. The correct answer is c) 30,000.
TRICARE is a healthcare program serving Uniformed Service members, retirees, and their families providing prescription drug coverage as one of its benefits. In the United States, TRICARE beneficiaries have access to an extensive network of pharmacies that includes major pharmacy chains as well as independent pharmacies. Beneficiaries can get their prescriptions filled at one of the many pharmacies in this network.