What was the significance of the Magna Carta? A. protected basic civil rights.
B. It was the first English document to limit the king's power.
C. it served as a rough draft for the U. S. Constitution.
D. It established a legislature representing the common people.

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.