Which of the following is a requirement for a valid offer?

For an offer to be considered valid, it must appear to be seriously intended and communicated to the offeree. This emphasizes the importance of mutual understanding and intent in contract formation. The offeror must demonstrate a genuine intent to enter into a contract, and this must be clearly communicated to the offeree in a manner that they can understand.

This requirement is fundamental because it ensures that the parties are on the same page regarding the terms and conditions of the agreement. If the offer does not convey a serious intention, it cannot be considered a legitimate offer that can lead to a binding contract.

While some options may relate to certain legal contexts, they are not requirements for a valid offer in general contract law. For example, having a witness or requiring signatures might be applicable in specific jurisdictions or for particular types of contracts, but they are not universally necessary for the establishment of an offer. Meanwhile, while written offers can provide clarity and enforceability, many agreements can be valid even when made verbally, as long as the other elements of a valid offer are met.