When a Contract for the Sale of Goods Is Modified

Multiple Choice

When a contract for the sale of goods is modified such that the total price due under the contract is modified,under what circumstances must the agreement to modify be in writing?

A) If the original contract amount was $500 or more.
B) If the contract price is changed by more than $500.
C) If the new contract price is more than $500.
D) B and C only.
E) A,B,and C.