it's C because,
Nat Turner's Rebellion was a slave ... The state executed 56 slaves accused of being part of the rebellion, and many ... He witnessed a solar eclipse on February 12, 1831 and was convinced that it ... alarm led to whites' attacking blacks throughout the South
During the Gilded Age, 1876-1900, Congress was known for being rowdy and inefficient. It was not unusual to find that a quorum could not be achieved because too many members were drunk or otherwise preoccupied with extra-governmental affairs. The halls of Congress were filled with tobacco smoke, and spittoons were everywhere. One disgusted observer noted that not only did the members chew and spit incessantly, but their aim was bad. The atmosphere on the floor was described as an “infernal din.” The Senate, whose seats were often auctioned off to the highest bidder, was known as a “rich man's club,” where political favors were traded like horses, and the needs of the people in the working classes lay beyond the vision of those exalted legislators. The Senate dominated the federal government during the Gilded Age. Causing the world to react as if America wasn't under good control.
In other words, the world reacted as America wasn't mature.