Answer:
Correct answer is They didn't want any more involvement in other countries' troubles.
Step-by-step explanation:
First option is not correct as Wilson was respected as president and finished his second term in 1921.
Second option is not correct as this type of thinking was never stressed out.
Third option is correct as they believed that involvement in other countries problems could only bring them problems.
Last option is not correct as United States actually believed that Peace of Versailles was in some parts too harsh.