What are the key elements of a valid contract?

A valid contract must include several essential elements that contribute to its enforceability and clarity. The correct option highlights three crucial components: legal age, offer and acceptance, and legal actions.

Firstly, legal age refers to the requirement that parties entering into a contract must be of a legal age to do so, typically 18 years or older in most jurisdictions, ensuring they possess the legal capacity to understand the implications of the contract.

Secondly, the principle of offer and acceptance establishes that one party must present an offer that the other party must accept for a binding agreement to form. This mutual agreement is central to the contract formation process.

Lastly, legal actions imply that the contract's purpose must be lawful. Contracts that involve illegal actions or purposes cannot be enforced by law, which undermines the validity of the agreement.

The other choices fail to encompass all the necessary elements or do not accurately represent what constitutes a valid contract. For instance, relying solely on signatures or written documentation does not address the need for mutual consent and legal capacity. Additionally, mutual understanding and verbal agreements may lead to misunderstandings and are often hard to enforce without clear terms laid out in a contract. Thus, the inclusion of legal age, offer and acceptance, and lawful actions is essential for a contract