Answer:
The correct answer is A. The instrument of the Roman Republic that was generally considered to be the most powerful and prestigious was the Senate.
Step-by-step explanation:
The Senate was one of the institutions of the government of Ancient Rome, it was composed during most of the Republic by 300 members extracted from the former magistrates, although after the dictatorship of Sila and in imperial times that number increased to 900. It was in charge of ratifying the laws voted by the elections, advising the magistrates, directing foreign policy, finances and religion.