For Many Years,Hershey's Spent Very Little Money on Advertising,yet Its

For many years,Hershey's spent very little money on advertising,yet its chocolate bar was a successful brand.This success can be interpreted as evidence that:

A) advertising is really not needed for a brand to be successful
B) advertising increases product costs and prices
C) luck plays a major role in the success of a product
D) product quality and image are important determinants of success