A non renewable resource wouldn't replenish naturally like, oil. 
A renewable resource is something that can replenish naturally, like wood or wool.
        
             
        
        
        
Answer:
C
Explanation:
There was no C and D on yours but here is a picture of my son's exam.
 
        
             
        
        
        
Jeremy is developing an experiment and is concerned about the accuracy of his data.Which step can he take to best ensure accuracy? 
The first step he can take to best ensure accuracy of his data is to do further research and make experiments.
 
        
                    
             
        
        
        
Relationship is being connected by blood or marriage
        
             
        
        
        
I believe the indepent variable would be the drug they are administered.
All other variables stay the same except for this one.