The answer is: D
Explanation
The correct option is D: accord and satisfaction.
This is because accord and satisfaction is a legal concept that means accepting any other satisfaction than the performance originally agreed upon in a contract. An accord and satisfaction occurs when the parties to a contract agree to change the terms of their original obligation and perform according to the new agreement. The new agreement is called the accord, and the performance of it is called the satisfaction.
Option A is incorrect because reciprocal agreement is not a legal term, but a general term that means an agreement in which both parties give and receive something of value. A reciprocal agreement does not necessarily imply any change in the original obligation or performance.
Option B is incorrect because reciprocal acceptance is also not a legal term, but a general term that means an acceptance in which both parties agree to the same terms and conditions. A reciprocal acceptance does not necessarily imply any change in the original obligation or performance.
Option C is incorrect because reciprocal accord and satisfaction is a redundant term that does not exist in legal usage. Accord and satisfaction already implies a mutual agreement and performance between the parties, so adding reciprocal is unnecessary and confusing.