In Order for Theodoric to Seize Authority Over Italy, What

In order for Theodoric to seize authority over Italy, what did he have to do?

A) He had to make peace with the caliph in Baghdad.
B) He had to murder Odoacer, the Germanic leader with authority over the western Roman Empire.
C) He had to remove all vestiges of Roman rule and offices.
D) He had to convert to Catholic Christianity.
E) He had to pay tribute to the Visigothic chief, Alaric.