I would say A. "Be quiet, and you ought to be considerate of others." would be the most appropriate answer.:)
B is correct "Dozens" is spelled correctly. As for the other sentences their is incorrect spelling. :)
Answer:
Hyperbole
Explanation: Hyperbole is when someone is exaggerating something. Ex. I told you to clean your room a million times!
It's saying he slept the entire weekend when he really didn't he just slept a lot.