Final answer:
The statement that Warren's medical expense policy would cover his hospital expenses after reinstatement is incorrect.
Step-by-step explanation:
The correct statement regarding the grace period and reinstatement provisions in health insurance policies is A) Warren's medical expense policy was reinstated on September 30 and he became ill and entered the hospital on October 5. His hospital expenses will not be paid by the insurer.
During the grace period, the insured has an opportunity to pay the premium without losing coverage. However, if the insurer receives the premium after the grace period has ended, the policy may not be reinstated, and any claims during that time may not be covered.
Therefore, in Warren's case, since he entered the hospital after the reinstatement date, the insurer would not be liable to cover his hospital expenses.