The United States and the Soviet Union
The changes in technology, the cost of obtaining fuels, and the number of oil deposits discovered are some of the factors that helps predict the future of oil production. The number of oil refineries operating in the past does not predict to the future of the oil industry.
The answer is letter C.
Explanation:
development is a process that creates, growth, progressed, active change or the addition of physical, economic, environmental, social and demographic components.
D)They traveled in harsh, crowded conditions
