The Changing Ideological Orientations of Supreme Court Justices

The changing ideological orientations of Supreme Court Justices
-How did Justice Souter's 2009 retirement reflect the trend in this graph?

A) He waited for the Democrats to be in control of Congress.
B) He waited for a liberally-minded president who would appoint a justice with ideas similar to his own.
C) He wanted to avoid the appearance of impropriety when deciding important cases on the docket in 2008 -Consider This: Although the judicial branch was designed to be insulated from partisan politics,justices often employ an ideological slant,not only in their rulings but in their decisions on when to leave the court.
D) He hoped he might become Chief Justice.