To Enter the Federal Court System,litigants in State Cases Must

To enter the federal court system,litigants in state cases must

A) first have had their case decided by the highest court in the state.
B) ​​present a valid constitutional question to be decided by the justices.
C) ​simply pay the required fee and file appropriate paperwork.
D) have a case to which the federal government is a party.
E) ​argue before and be approved by a special master.