Which of the Following Is Needed to Impose a Quasi-Contract

Multiple Choice

Which of the following is needed to impose a quasi-contract?

A) a benefit having been conferred and injustice if the benefit were not paid for
B) actions implying a contract and an agreement as to the price
C) a promise asking for action and the requested action having been completed
D) a benefit having been conferred and objective intent that it be conferred
E) a written document signed by the parties