True/False: People used a hot air balloon to escape East Berlin.

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.

Who was the first explorer to sail all the way down the mississippi river

Only 1 vote per state regardless of size why is this a problem