Answer:
When Europeans began to explore and colonize other parts of the world, smallpox traveled with them. The native people of the Americas, including the Aztecs, were especially vulnerable to smallpox because they'd never been exposed to the virus and thus possessed no natural immunity.
The Israelite were pretty powerful at that time, so they placed the Canaanites into slavery.
It appears A. and B. took place on the same date, April 19, 1775, but those two were the earliest, and for D., the poem was published on 1781, but it is based on the actions of Paul Revere on April 18, 1775. So, if you mean the poem, A./B. is the answer, but if it the actions, it would be D.
Arriving at work on time everyday is a Work habit
