Major shifts in the Supreme Court's positions have usually been due to

a. the pressure of public opinion.

b. new developments that dramatize an immediate need for change in the law.

c. turnover in the Court's membership.

d. threats from Congress.

e. threats from the president.

I would say B ?

3 answers

I disagree. The SC doesn't make laws.
Read Article III carefully: http://www.law.cornell.edu/constitution/
Threat from the congress?
C. The changeover of major members of the court can have a dramatic impact on the decisions they render. Some courts consider constitutionality settled after it's first review while other courts use the opportunity to reevaluate major decisions.