U. S. involvement in the Korean War helped the United States fulfill its foreign policy goals in Asia by .
a. providing the United States with access to Asia to develop trade.
b. supporting the U. S. policy of containing communism.
c. enabling the United States to prepare for the conflict in Vietnam.
d. helping the United States slow the proliferation of nuclear arms in the region.

Which of the following was not an important contribution made by the lewis and clark expedition? a. they made detailed descriptions of the terrain of the louisiana territory. b. they fostered relationships with native american tribes. c. they advanced the u.s. fur trade with european buyers. d. they secured the u.s. border of the oregon territory by negotiating a treaty with england.