The lewis and clark expedition (1803–1806) was
important because it
(1) determined the route of the first transcontinental railroad
(2) opened an all-water route to the gulf of mexico
(3) removed the british threat from the
northwest territory
(4) increased understanding of the area included
in the louisiana purchase

the answer you are looking for is letter c. he supported the idea of a un-run war in serbia to bring peace to the area.

supporting this idea was an important step that bill clinton took in order to attempt to secure bosnia and keep the peace there. he led peace reconciliations -known as the dayton agreement- leaving bosnia as a single state made up of two parts with one central government.