Which method is NOT a valid way to communicate acceptance of an offer?

The correct answer highlights that text messaging is not a traditionally recognized method for communicating acceptance of an offer, particularly in the context of contracts. In legal terms, a valid acceptance typically requires that the method of communication be clear, reliable, and mutually understood by both parties involved.

Oral communication, personal delivery, and mail or FedEx are all established methods that have long been recognized in contractual agreements as effective means of conveying acceptance. They provide a clear and documented way to show that acceptance has occurred.

In contrast, text messaging can lead to ambiguity regarding the intent to accept an offer, due to its informal nature and the potential for misunderstandings. Additionally, the legal standing of text messages can be more complicated, sometimes lacking the required formality that other methods possess. Therefore, understanding these nuances helps in grasping the principles of contract law and the importance of clear communication in real estate transactions.