Final answer:
A non-active duty beneficiary in Group B pays a fixed enrollment fee with TRICARE Select, which is a predetermined set amount for the coverage period.
Step-by-step explanation:
A non-active duty beneficiary in Group B pays a fixed enrollment fee with TRICARE Select. For those in Group B, the enrollment fee is not based on usage or sliding scale; it's a predetermined amount that is set for the coverage period. The distinction between active duty and non-active duty is important in determining fees and benefits under TRICARE, the health care program serving uniformed service members, retirees, and their families.