Help please I will give brainiest to whoever gets both or even all

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.

The articles of confederation allowed congress to: make and borrow money. declare war. create a postal service. all of these choices are correct.

Which expression is equivalent to (fg)(5)