How did people change the land in Argentina

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.

In what way did expansion and global trade during the 15th to 18th centuries affect the economies of european countries?

31/3: which equation has the solutions x =?