Balance your freedom and responsibility by managing your time. After figuring out your class (and/or work, internship, volunteering, etc) schedule, go through your calendar and set aside a specific time just for studying and homework.
B. Because the internets not always right
It enhances his personality and portrays that he is very temperamental but also that his honor is very dear to him. At the same time it means he truly cares about his reputation to the point of sacrificing his life for it.
Hope this helps!
D object of a preposition
Based on my point of view I would think of it as Kevin showing his compassion for his father, or trying to show a link for family care.
And no, I don't think it has anything to do with Kevin being a little thief. xD Unless that's what the story portrays.