The Answer For This Question is D
Answer:
On October 4, 1957, the Soviet Union launched the earth's first artificial satellite, Sputnik-1. ... As a result, the launch of Sputnik served to intensify the arms race and raise Cold War tensions. During the 1950s, both the United States and the Soviet Union were working to develop new technology.
Explanation:
So the answer is A
One of the greatest natural advantages that the kingdoms of West Africa had was easy access to the ocean, since they were primarily located on the coastline, which greatly facilitated trade with other nations.
