Grandpa Willy was found mentally incompetent by a court after he tried to shear his sheep with a lawn mower. Grandpa Willy is aware that he needs to take it easy and collect his senses. After examining his finances he decides he can afford a Caribbean cruise. After checking with several travel agents he determines that Club Polygrip offers the best deal. He prepays for a seven day cruise with Club Polygrip. Grandpa Willy and Club Polygrip have entered into _______________________.A. a voidable contract
B. a valid contract
C. a void contract
D. an executed contract