The "Confirmatory Memorandum" Exception to the UCC's Statute of Frauds

The "confirmatory memorandum" exception to the UCC's Statute of Frauds provision:

A) requires that the memorandum be signed by the party to be bound.
B) requires that the memorandum be sent within ten days after the contract is made.
C) applies even though the memorandum does not satisfy the UCC's writing requirement.
D) requires that both parties to the contract be merchants.