The word "barbaric"(para.3) probably means ______.

A．Railroads provided relatively easy access to the west for the first time.
B．Railroads performed a useful service in extending the frontier and helping to achieve national unity.
C．There were abuses about building and operating the railroads.
D．The economy of the west is robust.

A．the U.S. government's policies towards the American Indians were progressive
B．the west should be controlled by the U.S. government
C．numerous abuses were among the results of the railroads' rapid spread
D．the U. S. army could be considered a friend of the American Indian