Rationale Behind the 'Europe First' Strategy

In the context of World War II, the United States encountered various dilemmas that shaped its military and diplomatic strategies. After Japan attacked Pearl Harbor in December 1941, the U.S. government had to decide on its approach toward both the Pacific and European theaters of war. One of the major strategies employed was the 'Europe First' policy, which prioritized defeating Nazi Germany over other military engagements. This strategic decision was influenced by several factors, including assessments of military capabilities, threats posed by the Axis powers, and the geopolitical ramifications of the war. Which of the following reasons best explains the rationale behind the 'Europe First' strategy?