The 1804 Mission to Investigate the Northern Portion of Land

The 1804 mission to investigate the northern portion of land purchased from France was completed successfully, partially because

A) Army quartermaster and commissary corps provided adequate supplies.
B) Indians generally accepted their explanation that they were interested only in trade, not additional territory.
C) Sacagawea, a Shoshone woman, served as guide and interpreter.
D) Unfriendly Indians who lived along their route were mostly absent on hunting trips.