Which of the Following Statements About Buying Centers Is True

Which of the following statements about buying centers is true?

A) The most efficient buying centers have no more than five members.
B) No one individual should assume more than two buying center roles.
C) Buying centers are clearly labeled on all organizational charts.
D) Complex purchase situations usually have fewer people involved in the buying center than less complex purchases.
E) Membership and influence in a buying center vary from company to company.