Which of the following is a ground for avoidance of a contract based on a unilateral mistake?

A) Both parties are mistaken about a fact.
B) The nonmistaken party caused the mistake.
C) The mistaken party had reason to know of the mistake.
D) Person affected by the mistake does not bear the risk for it.

Unilateral Mistake

A situation in contract law where only one party is mistaken about a basic assumption on which a contract is made, which can impact the enforceability of the contract.

Mistake

An incorrect belief or understanding regarding a fact, judgment, or event that can affect the validity of a contract.

Avoidance

The legal process or action taken to nullify or declare a transaction void, preventing its enforcement.