A Disadvantage of Sales Promotion Is That

A disadvantage of sales promotion is that:

A) it does not add immediate value to a brand.
B) it does not help in building market value.
C) it can draw competitors into a price war if overly aggressive sales promotions are used.
D) it cannot be used by manufacturers and wholesalers in the marketing channel.
E) it is less effective than advertising in motivating customers to switch to a new brand.