Select the correct answer. Article III of the Constitution prohibits Congress from lowering the salaries of federal judges in office. What is this an example of? A. supremacy clause B. judicial review C. separation of powers D. federalism E. habeas corpus

in 1862, president lincoln's emancipation proclamation opened the door for african americans to enlist in the union army. although many had wanted to join the war effort earlier, they were prohibited from enlisting by a federal law dating back to 1792.

explanation:

impeachment is when a president is committing treason or doing shading acts while in presidendcy therfor he can be impeached   by congress

the correct answer is c.