Which sentence uses commas correctly?

A.
Some streams contain germs and these can make you sick.

B.
On a hike you may get thirsty, but, don't drink from a stream.

C.
People in some cities drink water from lakes, but this water has been purified.

D.
People in the country may get their water from a spring or, they may get it from an underground well.

@TainringDragon

Question

Which sentence uses commas correctly?	
 
 A.
Some streams contain germs and these can make you sick.
 
 B.
On a hike you may get thirsty, but, don't drink from a stream.
 
 C.
People in some cities drink water from lakes, but this water has been purified.
 
 D.
People in the country may get their water from a spring or, they may get it from an underground well.


@TainringDragon

anonymous · Answer

C.People in some cities drink water from lakes, but this water has been purified.
A has no coma. 
C wrong placement of comma
D: wrong placement of comma

anonymous · Answer

thanks again