For many years Rolex watches and Colt firearms spent very little money on advertising yet were successful brands. The success of these products can be interpreted as evidence that:
A. product quality and image are important determinants of success.
B. advertising increases product costs and prices.
C. advertising is a major barrier to entry.
D. advertising is never really needed for a brand to be successful.
E. luck also plays a major role in the success of a product.
Answer: A