Answer:
C)
Explanation:
Lewis Nixon invented the very first Sonar type listening device in 1906 as a way of detecting icebergs. Interest in Sonar increased during World War I when there was a need to be able to detect submarines.
Answer:
D.
Explanation:
D.
the decision to set enslaved people free after the American Revolution
This is what it seems whoever I am still quite unsure.
Immediatly lead to a treaty that limited the number of nuclear weapons in the U.S. and the Soviet Union
