Looking Broadly Across Several Cultures,two Important Lessons with Respect to Negotiation

Looking broadly across several cultures,two important lessons with respect to negotiation standout.One of those lessons is that:

A) regional generalizations are generally true.
B) regional generalizations are generally not correct.
C) stereotyping is a useful tactic.
D) generalizations are usually useful as a form of secondary research.
E) supply does not always match demand.