On what grounds may the validity of the insurance contract be challenged?

I need the answer thanks.

9 Jim, age 86 , suffers from Alzheimer's and he recently signed a life insurance contract. His daughter Elise, who is also his power of attorney, is concerned that he did not understand what he had purchased and would like to have the contract voided and his premiums returned. On what grounds may the validity of the insurance contract be challenged? a. Jim may not have the legal capacity to enter into an insurance contract. b. At 86,Jim is too old to enter into an insurance contract. c. Elise as his power of attorney, did not approve nor sign the contract. d. Jim has no grounds to challenge the validity of the contract