Correct Answer:
Option A. Influenza
During 1918 - 1919, an influenza epidemic killed about more than 20 million people. This epidemic killed more people than were killed due to the World War 1 and is said to be the most devastating epidemic of the history. Among the US troops which were deployed in Europe, more than half of deaths were a result of influenza rather than the killings done by enemy.
To avoid wars in the future
Discrimination and being treated as second class citizens
The trend that has been true in the United States is that minorities are growing fast.
The Mayans used a pyramid and the sun to help them create a calendar.
