The Changing Ideological Orientations of Supreme Court Justices

The changing ideological orientations of Supreme Court Justices
-Based on the graph,why might many Supreme Court decisions be decided by a vote of 5-4 in 2014?

A) The Court hears more cases on controversial issues than it did in the past.-Consider This: The Court has heard cases on controversial issues throughout its history,but was not as divided as it is today.
B) The partisan divide in the Court has grown wider over the years.
C) The increasing diversity of the justices leads to multiple opinions.
D) Presidents are more willing to appoint moderate justices than in the past.