i think it is c. second half of the 18th century hope it helps
He was writing about his belief, the U.S was destined by none other than God himself to expand from the Atlantic Ocean, all the way to the Pacific implementing democracy in very corner of the continent..
If you are talking about the first air pollution problem its is A, almost about 100 years ago.
1955
The correct answer would be D) local authorities' refusal to integrate Central High School. I say this because it is the only logical answer.
Answer: B. keep the balance of power in the Senate between the slave states and free states.
Further detail:
The Missouri Compromise (1820) admitted Missouri into the Union as a slave state with Maine being added at the same time to keep the balance of slave and free states equal. It also prohibited any future slave states north of the latitude line 36 1/2 degrees north of the equator in territories of the Louisiana Purchase, with the exception of Missouri (north of that line) being admitted as a slave state.