The song dynasty succeeded in reunifying several kingdoms
In this video segment, from the PBS documentary Looking for Lincoln<span>, Henry Louis Gates, Jr. and historian David Blight examine President Abraham Lincoln’s mixed motivations for issuing the Emancipation Proclamation. They conclude that while Lincoln ultimately recognized the moral righteousness freeing the slaves, his first and primary concern was strategic: it was the best way to rally the North and strike at the heart of the South’s economy. Gates and Blight then join a roundtable discussion of Lincoln scholars debating the legal authority of the Proclamation and its special meaning for African Americans.</span>
"<span>b. The North became integrated; the South remained segregated" would be the best option, since immediately after the Civil War the South implemented a series of Jim Crow laws that were meant to keep blacks separate from whites.</span>
The correct answer to this open question is the following.
Although there are no options attached we can say the following.
The judicial branch served as a check on the Executive and Legislative branch in that teh Supreme Court had the power and the faculty to declare a law unconstitutional.
That was the consequence of the judicial review established by the United States Supreme Court in 1803 when it resolved the case Marbury v. Madison.
The Supreme Court could review and decide the constitutionality of decisions made by the Executive branch and the Legislative branch because no action should contradict the Constitution of the United States.
That is the beauty of the checks and balances system in the federal government. That none of the three branches has more power over the other two.