Which of the following was a significant cause of the United States' entry into World War I?

A The Japanese attack on Pearl Harbor.

B The sinking of the Lusitania and German unrestricted submarine warfare.

C The formation of the League of Nations.

D The Soviet Union's invasion of Poland.

✓ Correct Answer: Option B

German unrestricted submarine warfare, particularly the sinking of the Lusitania, and the Zimmermann Telegram were key factors that propelled the U.S. into WWI.

💡 Why is B) the correct answer?

The correct answer to the question "Which of the following was a significant cause of the United States' entry into World War I?" is Option B: The sinking of the Lusitania and German unrestricted submarine warfare..

The other options — A) The Japanese attack on Pearl Harbor., C) The formation of the League of Nations., D) The Soviet Union's invasion of Poland. — are incorrect for this CLEP Exam Prep question. As explained above: German unrestricted submarine warfare, particularly the sinking of the Lusitania, and the Zimmermann Telegram were key factors that propelled the U.S. into WWI.

📚 About This CLEP Exam Prep Practice Question

This 1-level CLEP Exam Prep question from the US History topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free CLEP Exam Prep practice test or use flashcards for spaced repetition review.

Practice CLEP Exam Prep Quizzes → Browse All Questions Study Flashcards

Which of the following was a significant cause of the United States' entry into World War I?

✓ Correct Answer: Option B

📚 About This CLEP Exam Prep Practice Question

Related CLEP Exam Prep Questions