Which Statement About Channels of Distribution Is True

Which statement about channels of distribution is true?

A) Channels of distribution that include intermediaries result in higher distribution costs than channels without intermediaries.
B) Channels of distribution should be designed to increase discrepancies of quantity between producers and consumers.
C) Channels of distribution do not usually experience conflict as long as each channel member has profit as a goal.
D) Channels of distribution usually require longer-term planning than other market mix elements,because it is more difficult to change channel decisions quickly.
E) Channels of distribution are always characterized by conflict among channel members.