Which sentence does not contain any punctuation errors?

A.
On that mat by the back door you should leave your muddy shoes.

B.
On that mat, by the back door, you should leave your muddy shoes.

C.
On that mat, by the back door you should leave your muddy shoes.

D.
On that mat by the back door, you should leave your muddy shoes.

Question

Which sentence does not contain any punctuation errors?
	
	
 
A.
	On that mat by the back door you should leave your muddy shoes.
	
 
B.
	On that mat, by the back door, you should leave your muddy shoes.
	
 
C.
	On that mat, by the back door you should leave your muddy shoes.
	
 
D.
	On that mat by the back door, you should leave your muddy shoes.

anonymous · Answer

B, since 'by the back door' is a phrase that is additional information and won't change the sentence if it is taken out.