It's b pretty sure before the plague Europe suffered from overpopulation and unsanitary environment that was greatly fixed after most of Spain and Europe was wiped out leading the people left over to fix the problems
I think it was the CIA sorry if I’m wrong
CORRUPTING THE YOUTH OF ATHENS.
Answer:The answer is C. Water.
Explanation: The Edwards Aquifier had a main water supply which decided to give water to those who needed it and was the only source with clean water to give for about 2 million people to drink.