Cases Heard by the Supreme Court Under Its Appellate Jurisdiction

Cases heard by the Supreme Court under its appellate jurisdiction arrive there because

A) they involve foreign ambassadors and nations.
B) the justices have been asked to issue a writ of certification and to clarify a case for a lower appeals court.
C) a litigant who lost in a lower appellate court has convinced the justices to hear the case.
D) the solicitor general has determined it worthy of a hearing in the Supreme Court.