Which sentence does not contain any errors in comma usage?

A.
In a pool or at a beach, lifeguards are often on duty.

B.
In a pool, or, at a beach, lifeguards are often on duty.

C.
In a pool, or at a beach, lifeguards are often on duty.

D.
In a pool or at a beach lifeguards are often on duty.

Question

Which sentence does not contain any errors in comma usage?
	
	
 
A.
	In a pool or at a beach, lifeguards are often on duty.
	
 
B.
	In a pool, or, at a beach, lifeguards are often on duty.
	
 
C.
	In a pool, or at a beach, lifeguards are often on duty.
	
 
D.
	In a pool or at a beach lifeguards are often on duty.

anonymous · Answer

The answer is A.

anonymous · Answer

It is A because it's an adjectival phrase modifying the lifeguards. :)