What was “40 years in making", that eventually led up to WWI?

Why were the chang and xi rivers important to china’s development? a. they keep invaders out. c. they kept china isolated. b. they provided a route for ships to travel inland. d. they provided boundaries for the different political sections

Why is the federal reserve managed under the oversight of the federal government? the fed is responsible for printing and coining money. the fed is responsible for collecting income taxes. the fed is responsible for the government’s money. the fed is responsible for paying off government debt.(the first option isn't correct i tried that one)edit: the answer is the fed is responsible for the government’s money.

How did louis sullivan and william jenney change the face of american cities in the late 1800s