The boldfaced clause modify is Picture. (A)
        
             
        
        
        
The answer to the question is called "homophones". These words have same pronunciation, but different spellings. 
 
        
             
        
        
        
Answer: so I think this may be the actual answer if not oops 
The correct answer is
 (B)  ethylene-vinyl chloride
Explanation:
vinyl chloride. noun. a colourless flammable gaseous unsaturated compound made by the chlorination of ethylene and used as a refrigerant and in the manufacture of PVC; chloroethylene; chloroethene.