What Was Augustus? Attitude Toward the Republican Institutions After His

What was Augustus? attitude toward the republican institutions after his establishment of the empire?

A) Augustus modeled the empire on the republic, retaining the full authority of the republican institutions.
B) Augustus totally revised the government and eliminated all of the institutions and offices of the republic.
C) Augustus retained the office of consul and tribune, but eliminated the Senate as a meaningful part of the empire.
D) Augustus retained many of the institutions and offices of the republic, including the Senate, but took actual power in his own hands.