Bret and Cory Enter into a Contract for the Sale

Multiple Choice

Bret and Cory enter into a contract for the sale of Bret's textbook at the end of the fall semester for which Cory agrees to pay Bret $60.Cory wants to transfer her right to payment for the book to Del.This transfer

A) is prohibited.
B) may be oral or written.
C) must be implied.
D) must be in writing.