Multiple Choice
Why does a plume of contamination spread out (become wider) away from the source of contamination? 
A) Because the water flows faster and faster
B) Because of diffusion of the contamination and mixing of contaminated and uncontaminated water
C) Does not spread out away from the source
D) Will only spread out if it is close to a cone of depression
Correct Answer:

Verified
Correct Answer:
Verified
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