Answer:
Option: Invasion of Ethiopia, Manchuria, and the Rhineland
Step-by-step explanation:
The bold actions exercised by the Axis Powers led to the break of World War II. Invasion of Ethiopia by Italy in 1935, Japan military involvement in Manchuria, and German troops marched in the Rhineland and seizing it from France. All these events sparked tension in Europe, especially in England and France. Germany indestructible military (Nazi) with modern weaponry and Japan involvement in the Pacific Ocean led America and Britain to worry.