Why Do the Justices Only Hear a Small Fraction of All

Multiple Choice

Why do the justices only hear a small fraction of all cases appealed to them?

A) Many of the submitted cases are frivolous.
B) to show proper respect to the rulings made in the lower courts
C) to show proper respect to the other branches of government, and to fend off charges that the Court takes an activist role in policy making
D) The justices are too divided to agree on cases.