Выберите правильный вариант My dad thinks I am not able of

Изберите верный вариант My dad thinks I am not able of my own living, but I am going that he is wrong.
А) Earn; prove;
Б) Earning; proving;
В) Earn; to prove;
Г) Earning; to prove.

10. Изберите верный вариант Ive мейд ... mistakes now than I мейд last time.
А) Few;
Б) A few;
В) Fewer;
Г) Less.