Which One of the Following Is True of the Influence

Which one of the following is true of the influence of place of residence on political opinion?

A) Since the 1970s most suburbs of America's cities have been Democratic.
B) The Rocky Mountain states have always been a Democratic stronghold.
C) Since the 1950s,the Republican Party has become the majority or competitive in all southern states.
D) Since the 1950s,the South has shifted away from the Democratic Party and toward independent candidates.
E) Since the 1960s,the suburbs of America's cities have shifted away from the Republican Party and toward independent candidates.