Rivers played a role in trade. For instance, he Kingdom of Aksum was located along the southern coast of the Red Sea which facilitated trade. Rivers also played a role in agricultural production as they enabled the watering of crops to ensure high food yields.
Agricultural Revolution (begins in 18th c.)--Industrial Revolution (begins in late 18th c)--Urbanization--World population hits 1 billion (1804)--Flu Pandemic (1918)
Not sure if "dramatic population growth in developing countries" is a separate choice or part of the population hitting 1 billion. Population growth occurred through this whole time period but particularly after the Agricultural Revolution as it produced better food more cheaply. This boom would allow for more people to be available to work in industry as it develops.
B. The army was send to stop the strike
Answer:
"George Washington’s army at Valley Forge during the winter of 1777 and overheard Washington tell an officer that an angel had revealed a prophetic vision of America to him."
Answer:
China had become communist in 1949 and communists were in control of North Vietnam. The USA was afraid that communism would spread to South Vietnam and then the rest of Asia. It decided to send money, supplies and military advisers to help the South Vietnamese Government.
Explanation: