题目内容：

听下面一段独白，回答以下小题。

1.What is the similarity of logos?

A. They are in small size.

B. They are difficult to understand.

C. They are simple in design.

2.What colors are most frequently used in logos?

A. Red and yellow.    B. Blue and yellow.    C. Blue and red.

3.What does the blue color on logos stand for?

A. Trust.    B. Strength.    C. Energy.