B. Where the people recovering from drug abuse live together.
        
             
        
        
        
Marathons,soccer,volleyball,football,kickball,tennis,badminton etc...
idk if that is the answer you wanted 
 
        
                    
             
        
        
        
In blast injuries we split injuries into four parts. Primary blast injuries are dangerous because the expanding pressure and gas can cause the hollow organs of the body to rupture. The is massive rupturing can kill near instantaneously. 
Secondary injuries are were things are actually life threatening by flinging stuff. Shrapnel, burns, debris can hit a patient. 
Tertiary Injuries are noted as the next thing up, which is a patient can be flung away from the explosion, with collision into another object and the possibility of secondary impalation or blunt force trauma is possible. This is heavily reliant on the distance of impact.
So your answer is A.
        
             
        
        
        
No calcium helps keeps muscles strong so the other person who commented was wrong. 
The correct answer is perform muscle strengthening exercises regularly.
        
             
        
        
        
I would say b., mostly because it is good to have them know why they need to act in such a manner not just the "style" of which  the behavior is being done. Sometimes it is difficult for them to refine their behaviors, but it can produce progress