I want to A) before 500
hope this helps
        
             
        
        
        
The answer would be A.
The question you have to ask is, is it possessive? 
Yes it is possessive. 
The wing is owned by the bird. Its wing was broken.
It's means it is or it has. 
It's would not make sense in this case because you can not put it is or it has into this sentence.
        
             
        
        
        
Answer:
the answer is D
Explanation:
A is talking about a sharp tool B is talking about nails and claws C is talking about an X-ACTO knife D is talking about him actually writing something.