Which accident and health policy provision addresses preexisting conditions?

The accident and health policy provision that addresses preexisting conditions is the time limit on certain defenses. 
Time limit on certain defenses is a provision that must, by law be included in all individual health policies. The provision limits the length of time the insurer has to claim that the insured's claim was caused by a pre-existing condition that was not reported at a certain particular time.

Ithink option a is correct because you cannot donate a different blood group than yours because it won't match.option a says betsy can donate to mark. they have the same blood group so donation can happen.

Cuz i said so. which gives it to b