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

What is the mistaken impression of the American Indians created by most movies

A．All of them didn’ t know how to ride a horse.
B．All of them couldn’ t live without horses.
C．All of them were uncivilized and fond of killing.
D．All of them lived a wandering life on the horseback.