It is false that the scribes emphasized that the law was a matter of the heart, not just good outward behavior.
They emphasized both of these things, not only one.
A proxy war by definition is "A war instigated by a major power but itself does not get involved" I know the U.S got involved in Korea. Vietnam and had to help the British keep control during the Greek civil war so I'd go with Afghanistan since the U.S only supplied insurgent groups with weaponry and did not challenge the USSR openly.
The 3/5ths compromise addressed slavery and how much of a person a slave counted for when they voted. The compromise made each slave count as 3/5ths of a person.
Im pretty sure it might be A!