Sales Promotions Cannot Be the Sole Basis for a Promotional

Sales promotions cannot be the sole basis for a promotional campaign because

A) all sales promotions have legal time limit restrictions to prevent unfair trade practices.
B) sales promotions are too costly and soon become a financial liability rather than a promotional asset.
C) sales promotions are traditionally handled by (out-of-house) firms, not the manufacturers which often result in a significant loss of profit.
D) gains from sales promotion are often temporary and sales drop off when the deal ends.
E) consumers obtain an inflated impression of a product's actual value or worth.