Questions 11 -13 are based on the following passage. You now have 15 seconds to read questions 11- 13.

Why does the author use the saying "Knowledge is power" in the passage

A．Because the saying is the truest of all other sayings.
B．Because the author wants to emphasize the importance of the information explosion.
C．Because knowledge is more important than power in the information era.
D．Because knowledge equals to information in modern times.