B

Explanation:

Fraudulent misrepresentation as to the contents of a document renders the contract voidable at the option of the aggrieved party. The party misled by the fraud can choose to rescind the contract or affirm it and seek damages. Option A (void) is incorrect, as void contracts lack legal effect from the start, which is not the case here. Option C (valid) is incorrect, as the fraud affects the contract’s enforceability. Option D (illegal) is incorrect, as fraud does not necessarily make the contract illegal. The answer “B” aligns with contract law principles regarding misrepresentation.