Answer:
Slavery in the West
Explanation:
Slavery is closely relating from the first half of the 19th century in the westward movement, territorial expansion, and the frontier. The nation increased by adding new territories excessively until it reached the Pacific Ocean in the 1840s. In the west, slavery carried for the economic and social processes. The westward expansion took slavery in Mississippi, Alabama, Louisiana, and Texas.
In the South, slave owners demanded slavery because, without it, there was no growth in the country. Slaves used as labour in the plantations and domestic work.
Losing favor after 1828, the earliest method of nominating candidates for office was the legislative caucus. The correct option among all the options given in the question is option "A". The actual meaning of caucus in terms of politics is the gathering of supporters of a common political party. Although the term appeared in the United States of America, but later on it spread to other countries like Australia, Canada etc.
I think B preventing nuclear war
It makes the plants bigger and stronger
