By the 1800s, it took for ships to sail across the atlantic ocean. this increased speed reduced middle passage death rates. sanitary conditions also improved as slave traders took . this change was not done out of care for enslaved africans but from a desire to get a better price for them when they were sold.

the answer would be 50's sitcoms reinforced traditional roles for men and women.

a. competition with other nations.

answer: in october 1962, an american u-2 spy plane secretly photographed nuclear missile sites being built by the soviet union on the island of cuba. president kennedy did not want the soviet union and cuba to know that he had discovered the missiles. he met in secret with his advisors for several days to discuss the problem.

explanation:

the fact that could also be added to column b is that during world war ii, specifically between the years 1941 and 1945, japan expanded its territory towards the indonesian territory in what was known later as part of the "pacific war". in that time, japan could conquer the philipines, singapore,   borneo, central java, malang, cebu, sumatra and various other islands of the area, therefore expanding its territory for a brief period of time.