The best and most correct answer among the choices provided by the question is the second choice. The cause of studying rocket technology was that to explore the "last frontier". I hope my answer has come to your help. God bless and have a nice day ahead!
Answer:
Wilson's Fourteen Points were based on a major idea—the principle of self-determination, under which nationalities would have their own states. The members of a nationality or ethnic group share a cultural heritage, often associated with the place of its members' birth or descent.
Explanation:
Taxes were raised
working conditions were extremely hard
This was known as the "iron curtain." It was a term used to describe the boundary in Europe, which formed at the end of WWII and lasted until the ending of the Cold War.
