Answer: A) USSR's help in defeating Japan
Explanation:
The Yalta Conference is a historic event attended by the three major Allied nations in World War II, namely America, the Soviet Union and Britain. The conference happened. When it was becoming increasingly sure that Germany would be defeated. At the meeting, the three countries agreed on several common goals. Considering that Japan was still a danger, Soviet action in the military sense against militarism in Japan was approved, and the United States government promised assistance.