Read the following paragraphs and answer the question.
Taste is such a subjective matter that we don’t usually conduct preference tests for food. The most you can say about anyone’s preference, is that it’s one person’s opinion. But because the two big cola (可口饮料) companies—Coca-Cola and Pepsi Cola are marketed so aggressively, we’ve wondered how big a role taste preference actually plays in brand loyalty. We set up a taste test that challenged people who identified themselves as either Coca-Cola or Pepsi fans: Find your brand in a blind tasting.
It is implied in this paragraph that（）.
A.正确答案Cthe purpose of taste tests is to promote the sale of colas
B.the improvement of quality is the chief concern of the two cola companies
C.the competition between the two colas is very strong
D.blind tasting is necessary for identifying fans
