Which of the Following Is a Disadvantage of Collaborative Bargaining

Which of the following is a disadvantage of collaborative bargaining?

A) The bias toward cooperation may result in internal pressure to compromise when you don't really want to.
B) It can avoid confrontation.
C) There is an increased vulnerability to deception and manipulation by a competitive opponent.
D) It requires substantial process knowledge and skill to be effective.
E) All are potential disadvantages of collaborative bargaining.