The Policy Differences Between Democratic and Republican Parties Probably Have

The policy differences between Democratic and Republican parties probably have

A) grown clearer since the 1960s and 1970s.
B) grown closer as the country has moved in a more conservative direction.
C) stayed about the same, with very little difference between them.
D) widened more among rank-and-file voters but narrowed among party leaders.
E) grown closer as the country has moved in a more liberal direction.