A buyer has made an offer on a listed property and the seller has signed it$,$ indicating acceptance of the offer. What must still be done before this offer becomes a binding contract of sale?

OA$.$ The accepted offer must be recorded.

OB$.$ The buyer's earnest money must be deposited.

OC$.$ The buyer must be notified of seller's acceptance.

OD$.$ Nothing; the seller's acceptance immediately created a binding contract.