The correct answer is (b) setting a goal to read five new pages every night.
(A) will only make you dislike reading, as it won't be interesting or entertaining if you hate the subject you're reading about. (C) will only stress you out, as most people don't have the time to read an entire book in one day - not to mention, even if you manage to do it, you probably will read fast and not enjoy what you're reading as much. While (D) sounds fun, it won't do much to force you to read more, and it may be expensive.
(B) is the best option, because it's a reasonable goal. Overtime, you can build upon the goal as well.
