Answer:
A.
Explanation:
The Senate feared that Caesar's unprecedented concentration of power during his dictatorship was undermining the Roman Republic, and presented the deed as an act of tyrannicide.
I believe it was Justinian that managed to unite Rome, and expanding the Byzantine Empire.
Justinian favorite hobby was to argue about Christian doctrines..his books were 1. codex constitution 2. degista 3. institutiones and 4. novellae constitutiones post codicem.