The correct answer for number 1 is D) Ethnic tensions. -
- During this time, the Balkan region consisted of several different ethnicities trying to live under the same rule. This was highly unsuccessful and was only a matter of time before an event caused a huge fight between the people in this region.
The correct answer for number 2 is B) The attack on the navy base at Pearl Harbor.
- The Japanese military attacked the American military base at Pearl Harbor on Sunday, December 7, 1941. The next day, President Franklin D. Roosevelt asked Congress to declare war on Japan. Congress approved of it and the US officially entered World War II.
The correct answers for number 3 are : Heavy naval combat, trench warfare, and poison gas.