The doctrine of unconscionability has evolved through its application by the courts to include:

A) contract negotiating procedures and good faith.
B) substantive contract terms and duress.
C) good faith and freedom of contract.
D) contract negotiating procedures  and substantive contract terms .

The doctrine of unconscionability addresses issues related to both the process of negotiating a contract (procedural unconscionability) and the actual terms of the contract itself (substantive unconscionability). This includes unfair or overly harsh terms as well as imbalances in the negotiation process.