The economic circumstances in the late 1920s-early 1930s led to the rise to power of ultranationalist, militarists circles in Japan. This resulted in a more aggressive and expansionist foreign policy, especially in Asia: taking and occupying Manchuria (which was part of China), the Second Sino-Japanese War and other moves aimed at controlling the continent´s raw materials.
The answer that best describes how African Americans participated in the war effort during World War II is letter B. They were fully integrated into the armed forces and fought alongside whites. They actually volunteered to join
Trends in Latin American population growth over the past 50 years are best described as "increasing" and predominantly in the cities or places with urban reach.