Which of these is true about the navigation acts? a. they prevented american colonists from selling their crops to england.b. they american colonies build factories.c. they kept american colonists from trading with other english colonies.d. they encouraged shipbuilding in the american colonies.

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