Why was the system of alliances in Europe before the first world war a threat to peace

How did support for the allies change following roosevelt’s reelection in 1940?

I’m annoyed but glad that my history teacher left and quit her job as a teacher to become a flight attendant

How did the technology of the late 1800s affect the growth of cities? select one: a. cities were able to expand outward because of additions to railroads. b. electric streetcars enabled the wealthy city dwellers to move to the first suburbs. c. advances in steel and metal technology allowed for the development of the skyscraper, which allowed cities to grow upwards. d. all of these are correct.