Which of the following is NOT an acceptable way to communicate acceptance?

In contract law, acceptance is a critical element that must be communicated clearly to establish a binding agreement between parties. The concept of acceptance generally requires a clear indication of agreement to the terms proposed by the offeror.

Waiting for the offeree to make a choice does not constitute acceptance. Acceptance requires an affirmative action or communication from the offeree indicating their agreement to the terms. Simply hesitating or waiting does not provide that necessary affirmation. Contracts are founded on mutual consent, and silence or inaction typically does not infer acceptance in most situations under contract law principles.

On the other hand, verbal agreements, sending a signed contract by mail, and responding with a postcard all represent clear actions taken by the offeree to indicate their acceptance of the terms laid out in the offer. These methods of communication fulfill the requirement of conveying acceptance, rendering them valid ways of agreeing to a contract.