The Industrial Revolution made it easy for goods to be produced in large quantities. ... New inventions allowed crop production to increase each year, especially cotton. More slaves were needed to pick cotton until slavery was outlawed. The cotton gin removed seeds from the bowl.
B the maya developed the religious and solar calendars for political reasons
I believe that the Korean War started when the North Korean Communist army crossed the 38th Parallel and invaded non-Communist South Korea.
D, because that one starts with "why" which automatically opens it up for an argument. While the others are just simply statements or just a basic question.
each of a series of medieval military expeditions made by Europeans to recover the Holy Land from the Muslims in the 11th, 12th, and 13th centuries. The Crusades were a series of religious wars initiated, supported, and sometimes directed by the Latin Church in the medieval period. The term refers especially to the Eastern Mediterranean campaigns in the period between 1096 and 1271 that had the objective of recovering the Holy Land from Islamic rule.
-Kelly (Your Welcome)