Why has the United States preserved an alliance with South Korea since it came into existence?
A
South Korea’s valuable natural resources make it an important trading partner.


B
South Korea has allowed the United States to build a number of missile silos in its territory.


C
The United States wishes to prevent South Korea from becoming part of a united communist Korea.


D
The United States feels obligated to help South Korea after the United States’ military actions in southern Asia in the 1940s and 1950s.