4) Which statement BEST expresses the main idea of this passage?
 A)
 Native Americans were important to the history of
 Sacramento,
 B)
 Sacramento has been an important center for
 automobile sales.
 C)
 For a city to grow, it must develop good highways
 and rail systems for transportation.
 The development of Sacramento has been
 D) intertwined with the development of its
 transportation systems.