What does the UCC require for modified sales or lease contracts?

a. That the modifications are supported by new consideration
b. That the modifications be made in good faith
c. That the modifications are supported by new consideration and contain significantly different terms than the original
d. That the modifications be reasonably similar to the original terms, merely adjusting for changes in market conditions; or that the modifications be supported by new consideration
e. That the modifications be made in good faith and that the modifications are supported by new consideration