According to Your Text, What Is the Secret of Great

According to your text, what is the secret of great marketing when it comes to creating value?

A) figuring out how to charge the highest price for a product that customers are willing to pay
B) understanding the marketplace demands before competitors do
C) consistently creating new products for the marketplace
D) convincing customers that they need a product even if they do not
E) saturating the market with all forms of advertising promotions