I believe the answer is A.
Manufacturing, production and efficiency had increased through necessity during the Great War. America had emerged as a world industrial leader and the US economy was booming, profits were increasing which led to the period in American history called the Roaring Twenties with a massive rise in consumerism for the wealthy.
It made the state number even so there were an even number of slave states and non-slave states. It also abolished slave trade in Washington, d.c. becasue many people were angry about there being trading there.
The President . . . shall have Power to grant Reprieves and Pardons for Offences against the United States, except in Cases of Impeachment." The power to pardon is one of the least limited powers granted to the President in the Constitution.
