I think the answer for this one is C.
Expanded trade, regional empires, and increased global trade are all effects of which of "<span>b. the transition from river valley civilizations to classical civilization," since classical civilizations engaged in more far-reaching trade and cultural diffusion. </span>
Answer:
Explanation:
The world was changing because it was preceded by the Industrial Revolution.
These are the factors that led to World war 2 changing:
The Failure of Peace
The Rise of Fascism. .
Formation of the Axis Coalition.
German Aggression in Europe.
The Worldwide Great Depression.
Japan invading of China (1937)
Pearl Harbor and Simultaneous Invasions
I’m pretty sure it’s none of the above