I’m just trying to help so hopefully this did help;-)
I might be wrong, but I believe that it's D.) Delaware.
Sorry if it was incorrect.
Answer:
Louis for the American interior. The expedition traveled up the Missouri River in a 55-foot long keelboat and two smaller boats. In November, Toussaint Charbonneau, a French-Canadian fur trader accompanied by his young Native American wife Sacagawea, joined the expedition as an interpreter.
Answer:
Independent Variable : Memory Drug
Dependent Variable : Story Quiz Score
Explanation:
In studying cause effect relationship between two relationships :
The causal variable leading to change in effected Variable is the Independent Variable. The effected variable being changed due to causing variable is the Dependent Variable.
So, studying : 'Memory Drug' impact - on 'Story Retention Quiz Score' implies that Memory Drug is the Independent Variable effecting Story Quiz Score & Story Quiz is the Dependent Variable being affected by Memory Drug.