Sybil offered Celeste $$1000$ for her Jeep CJ$-7.$ Celeste knew that she would probably not get a better offer before she left town for the summer, so she said that she would sell it to Sybil for that amount. Sybil brought the cash over to Celeste's house only to find that Celeste had sold the Jeep to her next door neighbor for $$1200.$ Sybil said, "But we had a contract!" Did Sybil and Celeste have an enforceable contract?

a$.$ No$.$ The contract missed some elements like genuineness of assent.

b$.$ No$.$ The contract was not enforceable because it was not in writing.

c$.$ Yes. The contract was a complete contract with offer and acceptance.

d$.$ No$.$ The contract was not enforceable because they had not set delivery terms.