What is the definition of negotiation?

a$.$

The process of communicating effectively with others to achieve your goals.

b$.$

The process of manipulating others to get what you want.

c$.$

The process of reaching an agreement between two or more parties with different needs and interests.

d$.$

The process of persuading others to agree with your point of view.

e$.$

The process of using force to get what you want.