On April $1,$ Fine Corp. e$-$mailed Moss an offer to purchase Moss' warehouse for $$500,000.$ The offer stated that it would remain open only until April $4$ and that acceptance must be received to be effective. Moss sent an acceptance on April $4$ by overnight mail and Fine received it on April $5.$ Which of the following statements is correct?

A$.$ No contract was formed because Moss sent the acceptance by an unauthorized method.

B$.$ No contract was formed because Fine received Moss' acceptance after April $4.$

C$.$ A contract was formed when Moss sent the acceptance.

D$.$ A contract was formed when Fine received Moss' acceptance.