The answer I believe is Korean War
Answer:
Option B: The U.S was destined to expand westward and spread civilization.
Explanation:
Using the system of trial-and-error, you know that options C and D aren't the correct answers to the question, as the quote says nothing about land, nor about Native American tribes.
For the remaining two choices, Turner said nothing about the Americans becoming weaker with Western life – nor did he even mention any hardships! And so, with the three choices cancelled out, option B seems to be the best answer to this question.
American Post-Civil War inflation, the demonetization of silver in Germany and the US, and a large trade deficit were all factors. If it wants the main cause, I'd probably say the demonetization of silver.
ANSWER: C. Playing sports
