How can the congressional power to investigate provide for checks and balances among the branches of government?

a. the power to investigate can result in substantial increases in the budget for certain federal programs
b. congress can use its power to investigate to oversee the operations of various agencies of the executive branch.
c. the power to investigate ensures that congress will work closely with law enforcement agencies of the federal government.
d. congress may use its power to investigate to a state collect income taxes for state-run programs