The answer is "B" Powers of the branches of federal government
The cause of The Thirty Year War is that the Holy Roman Empire had conflict<span> with the Protestant. </span>France <span>fought </span>Spain<span> and the Holy Roman Empire for Europe Leadership. The effect of the war is that Sweden,</span>France<span> and their allies gained new territory.</span>
The British abandoned Boston in early 1776 because they were forced out of the country by the American soldiers.
American Revolutionary War was at large, and the Patriots, led by general Washington (who later became the first president of USA) won the battle at Boston, which was bloodless, by the way. This brought an end to an eight-year British occupation of the city.
Wong-Woo was eventually allowed to enter because the Secretary of Labor overruled the denial. This suggests that Wong-Woo had a valid application for coming to the U.S.
The answers that apply to the question would be: John Brown's raid AND the election of 1860. The other events had already happened by the time the civil wat started.