Since 'sullen' and 'moody' mean almost the same, we should find a word that has a similar meaning to 'monotonous'. The word that has the closes meaning to it is 'repetitious', meaning 'tedious, boring, dull'.
The answer that I have decided is B: worse off. Because he will be spending more than he is getting back from it.
1 is C. conversational3 is C. personification
The correct answer is true
Hope this helps
-AaronWiseIsBae
The 1st one and 3rd one is what I am guessing!