Final answer:
The accident and health insurance policy must cover additional children if added within 90 days of birth.
Step-by-step explanation:
The correct answer is d) Only if added within 90 days of birth.
If additional children are born to the family, the accident and health insurance policy requires that they be added to the policy within 90 days of birth to ensure coverage. This means that if the children are not added within this 90-day timeframe, they will not be covered by the policy.
It is important for parents to notify the insurance company of the birth of additional children and add them to the policy within the specified timeframe to ensure they have the necessary coverage.