Answer:
The right choice is:
Germany, Italy, and Japan
Explanation:
This is the coalition of the three fascist states in World War Two. They signed a treaty for mutual defense. It included a clause stipulating that if another nation declared war on one of the members of this alliance, then the other members of the Axis Powers would declare war on that third nation. Thus, Nazi Germany declared war on the USA following the Japanese attack on Pearl Harbor.
