One of the Surest Signs That the Supreme Court Is

One of the surest signs that the Supreme Court is going to agree to hear a specific case is:

A) if it involves an appeal from the Sixth District.
B) if the chief justice has ruled on similar cases in the past.
C) if the solicitor general is a party to the case.
D) if a member of Congress is involved in the lawsuit.
E) if the case has already been heard by a state supreme court.