Under the Common Law, Contract Modifications Must Be Supported by New

Under the common law, contract modifications must be supported by new consideration to be binding on the parties. Under UCC Article 2:

A) parties can only modify an existing sales contract in court
B) parties may not add new consideration to an existing sales contract
C) parties need not provide new consideration to modify an existing sales contract
D) parties need to provide new consideration to modify an existing sales contract
E) parties cannot modify an existing sales contract