Answer:
Augustus Caesar declared himself dictator in order to restore the power and prestige of the Senate after the First Civil War.
Option (d) is true.
Step-by-step explanation:
Augustus Caesar was the first Roman emperor, ruling from 27 BC until his death in 14 AD.
He was a shrewd politician and military strategist who played a key role in restoring the power and prestige of the Roman Senate after the First Civil War (49–45 BC), which had been fought between Julius Caesar and his rival, Pompey the Great.
In 27 BC, Augustus was granted the title of princeps senatus, which meant "first citizen of the Senate."
This title gave him a high degree of authority and influence over the Senate, which he used to gradually consolidate his power.
He also restored the Senate's power to appoint magistrates and to make laws.
Augustus's reforms of the Senate were a significant step in the development of the Roman Empire.
By restoring the Senate's power and prestige, he created a stable and effective political system that lasted for centuries.
Thus,
Option (d) is true.