In the Close Procurement process, you are responsible to complete each project procurement to support the Close Project or Phase process. In this context, the final equitable settlement of all outstanding issues, claims, and disputes by negotiation is done through:

Choice 1 Procurement Negotiations

Choice 2 Procurement audits

Choice 3 Litigation

Choice 4 Negotiated settlement

My choice was 1 Procurement negotiation since it is T&T of close procurement. but the correct answer is choice 4 Negotiated settlement.i haven't seen the term "Negotiated settlement" in pmbok. please help me whats wrong with my understanding.
Thanks.