Answer: A. Several publications in the mid 1800s made the cruelties of slavery public in the north.
The Missouri Compromise of 1820, which allowed Missouri to become a slave state, further increased anti-slave sentiment in the Northern states. The abolitionist movement began as a more organized, radical and immediate attempt to end slavery than earlier movements.
I hope this helps. they came, because of the widespread starvation in ireland in 1845. the california gold rush attracted chinese immigrants in 1849
Answer:
The Aztec civilization developed in the Valley of Mexico, wedged between high mountains and surrounded by lakes that provided fish, waterfowl, potable water and reeds for thatching and weaving. The climate was mild.