To identify the underlying structure in a chronology of events, historical social researchers use ______.

Until his death in late 2011, Kim Jong-il was the president of a

a. democratic nation. b. communist nation. c. anarchistic nation. d. totalitarian nation. e. oligarchical nation.

Over time, political parties in Congress have

A) ?become more inclusive of varying ideological perspectives.
B) ?tended to become more and more similar, giving voters fewer legitimate choices.
C) found it easier to identify common ground.
D) ?become more ideologically distinct.
E) ?largely abandoned traditional ideological viewpoints.