Marketers with Successful Brands Sometimes Hesitate to Expand the Use

Marketers with successful brands sometimes hesitate to expand the use of their brands because:

A) the Federal Trade Commission regulations limit the number of products that can be marketed under an individual brand name.
B) it is costly to maintain many product lines,and might weaken the firm's brand reputation.
C) it is often difficult to get additional marketing communications coverage for the brand.
D) manufacturing divisions usually control brand expansion and are often in conflict with the marketing division.
E) all of these.