James Had a Contract with Frasier to Fix Frasier's Plumbing

Multiple Choice

James had a contract with Frasier to fix Frasier's plumbing issue at his home.The contract was made to fix the issue for $3, 000.But after the work was completed Frasier refused to pay anything unless James agreed to accept $2, 500.
-To avoid legal nuisance, Frasier decides to compromise with James.He asks James to fix a tap in the barn for $250, and modify the current contract to include the tap in the barn.James agrees to this, and does as asked, while Frasier remade the contract.Which of the following would this kind of settlement be referred to as?

A) duress
B) past consideration
C) accord
D) mirror image rule acceptance