Which of the Following Describes a Benefit Associated with Systems

Which of the following describes a benefit associated with systems selling?

A) Systems selling produces a larger initial sale than regular selling.
B) Systems selling reduces compatibility problems for the buyer.
C) With systems selling, the supplier is often retained to provide after-the-sale service.
D) With systems selling, the supplier is in an excellent position to provide upgrades in the future.
E) All of the above statements about systems selling are True.