Question

Which of the following led to increased tension between the United States and Japan in 1937?

the Nanjing Massacre
Roosevelt’s Four Freedoms speech
Japan’s oil exports
the Lend-Lease Act

Answer 1

A. Nanjing Massacre

Answer 2

The correct answer should be The Nanjing Massacre

It's the only thing that happened specifically in 1937. The Japanese soldiers pillaged and plundered the city of Nanjing, raping and murdering hundreds of thousands of people. This led to many controversy with other world powers.