Answer:
d. he lacked the mental capacity to enter into the contract.
Step-by-step explanation:
If Paul wants to avoid the contract based on his intoxication when he bought it, he will need to prove that he lacked the mental capacity to enter into the contract. Paul, after the seven shots of whiskey, lacked the mental capacity to understand the consequences of his acts. Intoxicated as he was, he lacked the legal ability to enter into the contract.