Cor 13. Which of the following is correct with regard to consideration? a in a unilateral contract, a promise is exchanged for an act b. In a bilateral contract, there is an exchange of promises. c. Legal sufficiency is always related to adequacy of consideration d. Two of the above, (a) and (b) are correct. Alice says to Brian, "If I decide to buy a word processor next year, I will buy it from you." This is an example of: a. an illusory promise. b. past consideration. c. the pre-existing duty rule. d. good consideration. 15. Anna is 88 years old and has been declared insane by a court. One day Anna receives a telephone call from a health insurance salesman and purchases a $400-a-month Medigap insurance policy a. This contract is valid. b. This contract is voidable. c. This contract is void. d. This contract is unenforceable