Which federal court has original jurisdiction over most cases heard in federal court?
a. district court
b. court of appeals
c. the supreme court
d. the court of appeals for the federal circuit

Answer;

A. District court

District court is the court that has original jurisdiction over most cases heard in federal court.

Explanation;A federal district court is a court of Law where civil and criminal cases are heard. They are the general trial courts of the United States federal court system. Federal  district  courts have original jurisdiction over most cases heard in federal courts,Original jurisdiction is the power to hear a case for the first time, while the appellate jurisdiction is an authority held by a court to hear a case that is appealed from lower court.Supreme courts on the other heard exercises both original and appellate jurisdiction.

therefore, the efficiency is: