1. According to this author, the causes of The Great Depression... a. are agreed upon by all historical scholars.

b. are taught only in upper-level history courses in universities.

c. are not always agreed upon by everyone that studies history,

d. can only be understood by studying the economy of Great Britain.

#awesomeperson

Explanation:

congrats!

it was the first amendment

explanation:

the addition to geographic boundaries that might have  kept the people of the huang river civilization from traveling to far distance region is that they had learned about the other river valley civilizations but feared contact would bring invasion.

hope this .

plz give me brainliest!