Which of the following is true:

A) A party who misstates an important fact during contract negotiations has an affirmative duty to correct that misstatement before entering into the contract

B) Ms. Jane deliberately concealed hard to find defects in a machine she sold to Mr. Smith. The concealed defect materially altered the value of the machine and obscured a safety hazard. Bill may avoid the contract because of negligent misrepresentation.

C) Upon discovery, a unilateral mistake of material fact would normally result in the rescission of the contract.

D) All of the above are true