A．the 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

A．show that taste preference is highly subjective
B．argue that taste testing is an important marketing strategy
C．emphasize that taste and price are closely related to each other
D．recommend that blind tasting be introduced in the quality control of colas