5. Beginning with the emperors of the imperial period made full use of portrait
sculpture's potential as a tool for communicating specific ideologies to the Roman people.
A. Marcus Aurelius
B. Augustus
C. Vespasian
D. Julius Caesar

Beginning with Emperor Augustus, the potential of portrait sculpture as a tool to communicate with the Roman people was harnessed.

Augustus (63 BC-AD 14) was a politician of the ancient Roman Empire who was noted for holding the position of Roman emperor. His government began in the year 27 BC and lasted until his death in the year 14 AC.

One of the highlights of Augustus' rule was that he adopted his portrait sculpture and spread it throughout the empire. This was used as a tool to communicate important messages to the citizens of Rome.

This tradition is also noted for taking aspects of the Hellenistic style and combining them with Roman aspects. On the other hand, they highlighted some physical characteristics of Augustus (and other emperors) such as:

This tradition transcended several imperial reigns from the reign of Constantine the Great.

Learn more about Augustus in: link

where and what are the statements?