I believe you have a typo when it comes to the first option - it should be athletics, not athletic. The word athletic is an adjective, and the word athletics is a noun.
That being said, the correct answer is A. athletics. Even though this noun ends in -s, it is still singular. The rest of the options are all plural nouns. 
        
                    
             
        
        
        
Answer: Hey, everything is gonna be okay because if you’ve already forgotten, you’ve already gone through so much and you pushed through. Stay strong, and don’t let anyone change who you are and what you believe in.
 
        
             
        
        
        
Answer:The writing covers a wide range of elaborate personal fitness issues and it best describes the reality of flaws dominant in the contemporary society. 
Explanation:it is an expression of vivid realities exemplified in our society's values.