We have the legal rule that “it takes a contract to end a contract”. Which of the following would not meet this requirement?
a. Watson had contracted with Holmes to do some research. Watson asked to call it off and Holmes agreed before either had performed under the contract.
b. Mutual waiver.
c. A condition subsequent is met.
d. A written statement by one party stating "the contract is cancelled".
e. Ms. Marple had already paid to have the windows washed when the other party to the contract said he didn't want to do them. She agreed if he would return the money. He promised he would and did.