18. What started World War II?
a. the invasion of the US by Japan
b. the invasion of France by Nazi Germany
c. the invasion of Poland by Nazi Germany
d. the invasion of Italy by Nazi Germany

C. The invasion of Poland by Nazi Germany

Explanation:

On September 1, 1939, Hitler invaded Poland from the west; two days later, France and Britain declared war on Germany, beginning World War II. On September 17, Soviet troops invaded Poland from the east.

b - divides power evenly between three separate branches