If it doesn’t give you answer choices then I’m guessing it’s exercise
        
             
        
        
        
Your driving may be impaired by __________
 c. all of the above
        
                    
             
        
        
        
Answer:
abstain, or refrain from, sexual activity
 
        
                    
             
        
        
        
Although exercise is the best way to do that, there are other ways. 
Practice controlled breathing exercises, which are easy to do from the comfort of your home. 
One is where you take a few small breaths in and one large breath out. Keep doing this. 
Breathing exercises are also relatively easy to find on the internet.