Directions: In each group, there is one topic sentence with the other three as its supporting points. Select the topic sentence in each group
选项：

A:

Color is also an important issue in the  design of advertisements

B:

Bright, bold colors create a different impression from pale, pasted colors, and certain colors carry certain cultural associations and meanings.

C:

Red, for example, may mean danger or   passion.

D:

Green and  blue, on the other hand are cool colors and are associate with a clean, fresh   image.