Which factor played the GREATEST role in making World War I one of the deadliest conflicts in human history?

A) The use of atomic weapons in the Pacific and the genocide of the Holocaust in Europe.
B) New military technology like airplanes, machine guns, tanks, and poisonous gas made combat deadlier than ever before.
C) Improved transportation and shipping methods made getting troops and supplies from one place another easier than ever before.
D) Improved medical technology and methods reduced the effect of disease and improved survival rates for soldiers wounded in combat.

Write about 50 words explaining whether or not this passage supports that explanation.in the introduction, you heard genghis khan’s explanation of why the mongols were successful conquerors in his time. the mongols were illiterate . . and perhaps no more than 700,000 in number. . they were herdsmen on the grassy plains north of the gobi desert, south of siberia’s forests. before the year 1200, the mongols were fragmented, moving about in small bands headed by a chief, or khan, and living in portable felt dwellings. the mongols endured frequent deprivations [hardships] and sparse areas for grazing their animals. they frequently fought over turf, and during hard times, they occasionally raided, interested in goods rather than bloodshed.

Why did kennedy authorize u2 planes to get “full, complete, 100% coverage of the island”?

Which statement accurately describes the harlem renaissance of the 1920