Answer: B) Reading good books can help you discover who you are and what you value.
Explanation: parallelism is a literary device that consists in the repetition of the grammatical structure of different words or phrases in a sentence or paragraph, in order to emphasize an idea or to create an impact in the audience. In the given sentence we can see an example of a faulty parallelism because the structures of "who you are" and "your values" aren't the same. The revision that corrects this error, is the corresponding to option B, because by changing "your values" by "what you value" the structure becames parallel.