Which statements best explain why the Lewis and Clark expedition was a success? ​
Select the three correct answers.
A The expedition established claims of the United States over those of Spain.

B Native American tribes were easily conquered with superior weapons.

C Native Americans agreed to defend territory for the United States.

D Native Americans interacted and cooperated with the explorers.

E The explorers made observations about new plants and animals.

F The explorers identified areas that settlers would consider attractive.

G The expedition found the best seaports in the western United States.

D Native Americans interacted and cooperated with the explorers.

Explanation:

Their mission was to explore the unknown territory, establish trade with the Natives and affirm the sovereignty of the United States in the region. One of their goals was to find a waterway from the US to the Pacific Ocean.

Famously, Sacagawea helped them on their journey at only 16! and she was pregnant at the time. She and her people knew the land well and helped them reach the pacific and navigate the Louisiana purchase to the Pacific Ocean.

Hope it helps!

-colin

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use wikipedia, i think they have this.