Answer:
a.Congress is very effective in providing oversight of the bureaucracy.
Step-by-step explanation:
The oversight that the congress has over bureaucracy depends a lot on its capacity and its willingless to actually do it, it alos depends on who´s got the majority on congress, but overall the congress has avery effective and efficient way of overseeing the bureaucracy of the United States if they decide to do it, with different hearins and audits on the different government boards.