The correct answer is A. lunches and river.
A common noun is concrete - it refers to something you can touch, feel, something that surrounds you; words such as desk, mirror, rug, are all common nouns. 
B is incorrect because those are proper nouns, meaning they refer to the names of people or places. C is incorrect because eat is a verb, and side is an abstract noun. D is incorrect because both words are verbs. 
        
                    
             
        
        
        
I can’t make a whole essay, but you can add this to ur essay :) 
Soccer is a good sport for maintaining health, fitness, strength and endurance. You can play with a club, learn through a junior clinic or have a kick with friends. ... Mix up your physical activity with other low-impact sports.
        
             
        
        
        
No it’s not, if you read it aloud it doesn’t make sense !!!