Answer:
a. growing cities in the East
b.new railroads and refrigerated cars.
c.barbed-wire fences
Explanation:
The 1800s were a period of discovering economic potentials in the United States that saw many ventures being initiated. Coupled with new technologies, theses ventures such as meat production and mining, saw profits increase and became big businesses.
Cattle for example experienced a massive growth that was brought by the cities in the east growing in size and demanding more meat to feed their populations. This demand coupled with new railroads and refrigerated cars meant that the meat could be transported long distances to these cities without worrying about them getting spoiled.
Also, with improvements in barbed-wire technology, land-owning ranchers could prevent other livestock from grazing on their fields while they themselves allowed theirs to graze. This led to cows eating healthier and therefore having more meat.
The correct answer is "A".
The Wilmot Proviso in 1846 was an unsuccessful attempt to ban slavery in the territories acquired from Mexico after the events of the Mexican-American War. It was proposed by Congressman David Wilmot to the House of Representatives. It would eventually pass the House of Representatives but fail to pass the Senate.
The disagreements over this proviso were one of the events that led to the American Civil War.
C. Spain sent money and supplies to colonist
Spain also provided money, supplies and munitions to the American forces
These people were described