Brown vs. The Board of Education was a case tried by the Supreme Court from 1952-1954, in which the Supreme Court ruled in favor of Brown, saying that for public schools to separate black and white students was unconstitutional.
This is known as the Anaconda Plan.
This military strategy, developed by Union General Winfield Scott, was meant to starve the Confederacy out of their resources. Essentially, Scott felt that if the Confederacy could not trade for goods with other countries they would not be able to survive. This is due to the Confederacy's reliance on cotton as their main cash crop.
This strategy helps to explain why the US wanted to blockade trade with other countries as well as why the Union wanted to control the Mississippi River, as they knew control of this waterway could negatively impact the Confederacy's ability to transport/obtain resources.
A). studying the elections in countries where compulsory voting has already been implemented -apex
I believe the answer is "British Empire"