Final answer:
Newborn children of active duty family members are automatically covered under TRICARE Prime if they are born overseas or on a military base. The criteria for coverage do not include being the first child in the family or being born prematurely.
Step-by-step explanation:
Newborn children of active duty family members are automatically covered under TRICARE Prime if they are born overseas or on a military base.
The other two options, being the first child in the family or being born prematurely, are not criteria for automatic coverage under TRICARE Prime.
TRICARE is a government-funded health-care program aimed at military veterans and children in families with relatively low incomes.