Which effects did the invention of the steam boat have (multiple choice) a-increased travel westward b-slowed relocation of native americans c-expanded rights for african americans d-allowed cheap movements of goods

I would say D because it was more efficient to use steamboats to transport goods

The changes to agriculture in the united states since 1900 is that increased mechanization has increased food production, thereby increasing the need for labor. there has been an increased need for higher speeds of food production due the fact that the population in the united states continues to rise.