Which of the Following Is Not an Example of Insufficient

Multiple Choice

Which of the following is not an example of insufficient consideration for performance of a contract?

A) A vague promise to do something or refrain from doing something.
B) A price paid before the making of a promise: that is past consideration.
C) A sum of money that represents less than the reasonable market value of the goods or services.
D) A promise to do something that the promisor is already legally obliged to do.