Which of the following contracts can be disaffirmed?

Contracts entered into by minors can typically be disaffirmed because the law recognizes that minors do not have the same capacity to understand the implications of their agreements as adults. This protection is provided to ensure that minors are not taken advantage of in contractual situations where they might lack the experience or maturity to fully comprehend the obligations they are assuming. The ability to disaffirm a contract gives minors the opportunity to void agreements that may not serve their best interests, aligning with the legal principle aimed at protecting vulnerable populations.

In contrast, contracts signed by adults generally cannot be disaffirmed in the same manner, as adults are presumed to have the capacity and understanding to engage in contractual obligations. Contracts lacking consideration may lead to a different legal outcome, but they do not inherently provide grounds for disaffirmance as they may still be enforceable under certain conditions. Lastly, contracts with legal capacity are valid and cannot be disaffirmed by the parties involved, as they demonstrate that all parties have the requisite mental and legal capacity to consent to the agreement.