Which of the following is not one of the popular definitions of negotiation as presented in the ...

Which of the following is not one of the popular definitions of negotiation as presented in the text?
 a. A negotiation is an interactive communication process that may take place whenever we want something from someone else or another person wants something from us.
  b. Negotiation is the process of communicating back and forth for the purpose of reaching a joint agreement about differing needs or ideas.
  c. Negotiating is the end game of the sales process.
 d. Negotiation is to be used only to get the absolutely lowest price from a supplier.
 e. Negotiation is a process of formal communication, either face-to-face or via electronic means, where two or more people, groups, or organizations come together to seek mutual agreement about an issue or issues.