Answer:
C) Congress passed a bill that would allow an oil pipeline from Canada, but President Obama vetoed it.
Step-by-step explanation:
Congress passed a bill that would allow an oil pipeline from Canada, but President Obama vetoed it. This example demonstrates the checks and balances that are part of the separation of power in the U.S. government. It shows how the President has the power to veto legislation passed by Congress, and how Congress has the power to pass legislation, but the president can still reject it. This system of checks and balances ensures that no one branch of government becomes too powerful and allows for a balance of power among the different branches.