Who changed Rome from a republic to an empire after the Senate gave him power?

A.

Nero

B.

Diocletian

C.

Julius Caesar

D.

Caesar Augustus

I believe the correct answer from the choices listed above is option D. It is Caesar Augustus who changed Rome from a republic to an empire after the Senate gave him power. Augustus led Rome's transformation from republic to empire during the tumultuous years following the assassination of his great-uncle and adoptive father Julius Caesar.

Hope this answers the question. Have a nice day.