I believe he tracked how people were getting affected it was the very dirty conditions he took to hospitals and places where people were sick to see if they had ever been exposed to the inhumane conditions that caused Cholera
Answer:
I believe it would be B :)
Let me know if I'm wrong!
Venn diagram is one of the graphic organizers that shows a compare and contrast relationship between two things, people, places, or ideas.
How to make a Venn Diagram?
Usually, a Venn<span> diagram is a two overlapping circles.</span>
