Topaz Is a Brand of Wrist Watches Manufactured by Krypton

Topaz is a brand of wrist watches manufactured by Krypton Inc. Krypton spends little money on its advertising, yet Topaz is a highly successful brand owing to its attractive features, exquisite design, and performance. The success of Topaz can be interpreted as evidence that:

A) advertising increases product costs and prices.
B) advertising is a major barrier to entry.
C) product quality is an important determinant of a brand's success.
D) advertising is not needed for a brand to be successful.
E) advertising can minimize competition based on product improvement.