The mouth? MARK THE PERSON THAT SAID THE ANSWER FIRST BRAINLIST IM JUST HELPING HER/ HIM PLS MARK THEM BRAINLIST
        
             
        
        
        
I think that C. 30 is the minimum recommended spf for sunblock.
        
             
        
        
        
Answer:
Irregular, short, long, and flat
Explanation:
 
        
             
        
        
        
I believe it would be C. Cracking a rib. 
Because 
- CPR doesn't involve the arms
- Headaches can happen at any age 
- Not finding a pulse can happen with any person
- Cracking a rib would make the most sense to me due to that bone mass or density decreases as a person ages, the bones lose calcium and minerals causing them to deteriorate and become more brittle, which may result in them becoming easily breakable.
This is only my guess though, so don't take my word for it. 
Hope it helps at least a little. (:
        
             
        
        
        
Cardio- exercises like running, cycling, and rowing