Answer:
C) Better military leadership
Explanation:
The South fought for a living, thus had a great army, however the North was new to the fighting life and military.
President Dwight D. Eisenhower was the first president to explain the domino theory, although he never actually called it the domino theory. He was explaining it in regards communism in Southeast Asia.
A) coinage of money
the rest are stuff regulated by the state
Lines of Longitude is the answer