The Tetrarchy Was the Split of Rome into Halves and the Creation

Multiple Choice

The tetrarchy was the split of Rome 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 in the West and one in the East who were succeeded by caesars.
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.