Harold purchased 400 pairs of gloves from Isaac at a contract price of $800. Fifty pairs of the gloves were defective and a dispute arose as to the amount due under the contract. Harold refuses to pay the full $800, and Isaac is threatening to sue. Which of the following is correct with regard to this transaction?a. If Isaac agrees to accept $600 to settle the dispute and Harold agrees to pay that amount, the agreement is enforceable. b. If Isaac agrees to accept $600 to settle the dispute and Harold pays that amount, Isaac can still sue for the balance of $200 and will win the lawsuit. c. Harold is under a pre-existing legal obligation to pay the $800.d. Two of these but not all three