Many scientists believe that the first Paleo-Indians in North America a. arrived between 30,000 and 13,000 years ago
b. became extinct because the climate got too cold.
c. built boats to sail along the coast and trade with North America.
d. used the land bridge between Asia and North America to facilitate trade

Which event to improve foreign relations between the united states and china? a. president truman's announcement of u.s. involvement in the "police action" in south korea in 1950 b. president carter's recognition of taiwan in 1979 c. president nixon's escalation of the vietnam war in laos and cambodia in 1973 d. president clinton's proposal to allow china to join the world trade organization (wto) in 1995