<span>The Supreme Court
helped wear down the freedom of African-Americans after the civil war because
it didn't announce many of the laws that were intended to harass
African-Americans as unlawful. It even supported separation when it confirmed
that the doctrine of separate but equal was a constitutional right.</span>
John Calhoun argued that the 1828 tariff helped the North at the expense of the South (c). This was the case because the tariff bolstered Northerner industrial markets but required Southerners to pay more for manufactured good.
Common law is a system of law based on what the King accepted as the Common Standard. So the answer is B)
Look left, right and left again