An offer to purchase becomes a binding contract when the

A. seller mails the signed offer to the buyer's agent after making a price adjustment.

B. seller signs the buyer's offer and the listing agent communicates it to the buyer's agent.

C. listing agent emails the buyer's agent that the seller agrees to the buyer's offer as written.

D. listing agent tells the buyer's agent that the seller agrees to all but one term on the buyer's offer.