Correct. The answer is a. The author attributes the success of the Lewis and Clark expedition—especially its establishment of favorable relations with Indian tribes in the northwest region of the Louisiana Territory—to the presence of the Shoshoni woman, Sacajawea, and her baby. Sacajawea spoke several languages, which made her a valuable translator and mediator, and her presence made it clear to suspicious Indians that the expedition was peaceful.
Incorrect. The answer is a. The author attributes the success of the Lewis and Clark expedition—especially its establishment of favorable relations with Indian tribes in the northwest region of the Louisiana Territory—to the presence of the Shoshoni woman, Sacajawea, and her baby. Sacajawea spoke several languages, which made her a valuable translator and mediator, and her presence made it clear to suspicious Indians that the expedition was peaceful.