PLEASE ANSWER! What were three factors that led to the start of World War II?

Germany was divided into four sections.
Japan's attack on Pearl Harbor
The Triple Alliance was dissolved.
political problems
dictatorships
economic depression

(Select all that apply)

The american public did not truly take in the horror of adolf hitler's regime until years after the existence of concentration camps was first reported in american newspapers. partly this was the fault of the media, which did not give prominent placement to news of the holocaust. what other factors do you think contributed to the long delay in understanding the holocaust?