The duty of the prefect is advising the consuls and working with the senate.
Option: B
Explanation:
Prefects are those who are chosen by higher authority to control the underlying members in a definite direction. Their duty is to advise consuls and work with the Senate. Prefects look after all the important matter of Senate and whether all the directive principles are being followed by consuls or not.
They act as a role model to the other members. They don't have any power to make laws and judging cases in court. But they used to advise the members as per the directions and work accordingly with the higher authority.
The one that is the power granted to the legislative branch by the constitution is: Expressed powers One of the example of expressed powers is : the power to declare wars