Which of the following statements regarding marketing channel design is correct?

A$.$ Marketers should always maximize the number of intermediaries used in a channel.

B$.$ Channel objectives should be set in terms of profitability.

C$.$ In global markets, channel systems are the same in different countries.

D$.$ Channel alternatives should be evaluated against economic, control, and adaptability criteria.

E$.$ It is important to let the responsibilities of channel members evolve as their relationship develops.