Concept:A counter offer is a fresh proposal made by the offeree in reply to the original offer, and it legally cancels that original offer.Explanation:When the offeree responds with different terms instead of accepting, the law treats this as a rejection of the original offer.This new proposal, called a counter offer, replaces the original terms entirely.Once a counter offer is made, the original offer cannot be accepted later unless the offeror brings it back.Hence, a counter offer ends the original offer.Answer:B. a counter offer