This depends on the time period you are studying but from the looks of it I would say trains.
Answer:
By the 1930s the African American population of the Midwest and Northeast had more than doubled since 1900.
Explanation:
Given that the African-American population in the aforementioned regions was 500,000 people in 1900, and said population increased to 1,250,000 30 years later, to determine the population growth rate during that period, the following calculation must be performed:
1,250,000 / 500,000 = X
2.5 = X
Thus, the African-American population in these regions increased by 2.5, that is, more than doubled during that period of time.
they are usually elected by popular vote. please brainiest
Hiram Simpson Grant is the correct name for our 18th president.
It's correct
Answer:
D - Alliances between nearly all European nations meant that when two went to war, all became involved.
Explanation:
As we see from the pattern of alliance and agreements, each country was wary of the other for an extended period. The alliances that were meant to ensure the safety of each country, instead pulled so many into war with each other, just because they supported or had an agreement with the other to extend support during the war.