After the revolution, the practice of enslaving African Americans was illegal.
The answer to the first unknown is "POCKET" while in the second unknown is "CANNOT". Hence, in order for us to complete the statement in the problem we have it, a POCKET veto can occur when the president has presented a bill during the last ten days of a legislative session and CANNOT be overridden by a two-thirds vote in both the house of Congress.
They are family, way of believing, and language! Hope I helped~
I believe the answer you are looking for is A.