B, founded the Niagara Movement
The best choice would be C. Since there are over 20 slaves in this image, the plantation owner would be considered a member of the cottonocracy. The creation of the cotton gin actually lead to the continuation and dependence on the institution of slavery. Steamboats are not seen as the end of the Industrial Revolution. The Industrial Revolution was a long ongoing process that started in America in the late 1700s and continued into the 1900s. The crops pictured are cotton. Rice would be pictured in rice patties and tobacco looks very different from what is pictured.
A. 2,500,000 it can't be lower then 250,000 in the Roman Empire
The first inventions that harness natural energy resource is Water mill. Back then, people use the power of water to move the lever in order to create mechanical movement.
The invention that help transfer water from river to town is aqueduct. Or more commonly knwon as water bridgte, useful to navigate the movement of water.
Lever is the invention that makes lifting weight easier, mostly used in contruction sites.
If we start to travel from the Mississippi River westwards to the Pacific Coast, than the starting point is a lowland, vast one, as we continue to go towards the west we will encounter high mountains, the Rocky Mountains more specifically, and the elevation will go up to 4,400 meters above sea level, than we will go down, elevation wise, to the high plateaus and will be on elevations between 1,000 and 2,000 meters, and after we go up again to almost 4,400 meters as we cross the Cascade Mountains. After the Cascades we go gradually downwards towards the lowlands, where we will first go a bit bellow sea level, and than little up in the lowlands along the Pacific Coast, and at the end reach a point of zero elevation.
