Answer:
c. enforceable, because Raul's initialed notes are a sufficient writing.
Step-by-step explanation:
Since Raul has Raul initialed his notes of the deal, which include the terms, and sends a copy to Ben. This shows that, Raul has agreed to the contract.
To initialed a note means to sign or authorized a note; which is the copy of the agreement to the contract.
Hence, It is enforceable because duty of the contract which is often times written (verbal agreements are sometimes enforceable as well) is what makes a contract to be legally binding, and in it, is the obligations expected of the parties to a contract.