The Tetrarchy Was the Split of the Roman Empire into Halves

Multiple Choice

The tetrarchy was the split of the Roman Empire into halves and the creation of:

A) a single Augustus who ruled the wealthy East and a caesar who ruled the West.
B) two augustuses who ruled the East and two caesars who ruled the West.
C) an augustus and a caesar in both the East and the West.
D) a single augustus who ruled the troublesome West and a caesar who ruled the East.
E) an augustus to rule the empire,with four caesars to rule the four quadrants of the empire.