June Purchases $8,000 of Goods from Will on Thirty Days

June purchases $8,000 of goods from Will on thirty days' credit, and Will assigns the account to Mark.If June finds the goods defective and only worth $6,000:

A) she has no defense against full payment since the account was assigned.
B) she only needs to pay Mark $6,000 if Mark had notified her of the assignment.
C) Mark is entitled to the full $8,000 since he acquires rights greater than those of Will, who assigned the contractual rights to payment.
D) she must pay $6,000 directly to Will regardless of whether Mark notified her of the assignment.