Question

Which word correctly completes the sentence? This __________ collar is stained and wrinkled. A. dresses B. dress' C. dress's B?

Answer 1

C makes the most since to me try putting them in sentences like this it might help


A.  This __Dresses___ collar is stained and wrinkled.

or 

B.   This    Dress'         collar is stained and wrinkled.

or 

C.   This    Dress's        collar is stained and wrinkled. 

witch one makes the most since to you :D