Prove the formula of variance​

Which of the following statements best illustrates an argument on whether congress is effective on providing oversight of the bureaucracy? a. congress is very effective in providing oversight of the bureaucracy. b. congress is not very effective in providing oversight to the bureaucracy because they lack the technical expertise and they are part of the iron triangles that create a relationship with the bureaucracy and interest groups to show more a. congress is very effective in providing oversight of the bureaucracy. b.congress is not very effective in providing oversight to the bureaucracy because they lack the technical expertise and they are part of the iron triangles that create a relationship with the bureaucracy and interest groups to further their own interests and not necessarily the public interest. c.congress provides effective oversight of the bureaucracy through the budgetary process. d.congress is not effective in providing oversight because of the budget and enabling legislation.