Jason Is the Creditor in a Transaction with Carol,who Is

Multiple Choice

Jason is the creditor in a transaction with Carol,who is the debtor.Which of the following requirements is NOT necessary for Jason to have an enforceable security interest?

A) The collateral must be in Jason's possession,or there must be a written security agreement.
B) Jason must give value to Carol.
C) Carol must have rights to the collateral.
D) The collateral must be tangible.