All of the Following Are Compelling Reasons Why Sales Promotion

All of the following are compelling reasons why sales promotion should not be used as the sole promotional tool, except

A) its inability to generate long-term buyer commitment to a brand in many cases.
B) its inability to change, except on a temporary basis, declining sales of a product.
C) its ability to convince buyers to purchase an otherwise unacceptable product.
D) its inability to make up for a lack of advertising or sales support for a product.