The correct answers are "The Great Famine of 1315" and the Plague.
The Black Plague, which lasted from 1347 to 1351, was one of the most devasting events regarding human health. The estimated death toll due to this event ranges from 75 to 200 million people.
On the other hand, the great famine of 1315 lasted 2 years and signaled one of the most important food crisis of history. Effects of this event were high crime rates, disease, and cannibalism.
What jobs? I don’t see any.
D. The European population doubled as they benefited the most from the colonization of the Americas. Thousands of Native Americans died from working and of disease. Millions of Africans were sent to the Americas as slaves through slave trade