In a Criminal Case, When a Jury Cannot Reach a Unanimous

In a criminal case, when a jury cannot reach a unanimous verdict and the judge must declare a mistrial,

A) the prosecution has to seek a new trial with another jury or drop the charges.
B) the case is automatically dropped and the defendant is released.
C) the jury is relived of its duty and the judge continues to hear the case alone.
D) the case then proceeds to an appellate level court.
E) the case is put on hold for two months to allow the prosecution to gather new evidence.