When the State and Federal Governments Have Concurrent Jurisdiction

When the state and federal governments have concurrent jurisdiction

A) both courts are obligated to prosecute the offender.
B) the federal court must step aside and allow the state to prosecute the offender.
C) the state court must step aside and allow the federal court to prosecute the offender.
D) federal and state prosecutors will use their discretion to determine if one or both courts will prosecute.