John Used to Work for a Large,well-Known Retailer

John used to work for a large,well-known retailer.He left that company to go to a smaller company,and in doing so,he discovered that the channel functions were handled very differently in the smaller firm.Looking back at his experience,he noticed that larger firms:

A) perform many different channel functions themselves.
B) have more control in the channel.
C) can be more efficient.
D) can save money.
E) all of these.