Which of the Following Is a Provision of Obligation of Good-Faith

Which of the following is a provision of obligation of good-faith dealings under Section 1-203 of the Uniform Commercial Code (UCC) ?

A) Consideration is required for modification of a sales contract made in good faith.
B) In determining the intent a reasonable person would have had, due consideration is to be given to any practices which the parties have established between themselves.
C) Every contract or duty within this Act imposes an obligation of good faith in its performance or enforcement.
D) If the court finds the contract to have been unconscionable at the time it was made, the court may refuse to enforce the contract.
E) A proposal for concluding a contract addressed to one or more specific persons constitutes an offer if it is sufficiently definite and indicates the intention of the offeror.