When the Seller Unknowingly Makes an Erroneous Statement Regarding the Type

When the seller unknowingly makes an erroneous statement regarding the type of processor contained in a computer during negotiations leading to the sale of the computer, the contract

A) contains a common mistake.
B) contains a mutual mistake.
C) contains a unilateral mistake.
D) contains an innocent misrepresentation.
E) contains a fraudulent misrepresentation.