The revision which most effectively corrects the faulty parallelism in the above sentence is:
C. The novel is about a woman who is young, poor, and hardworking.
Parallelism is the use of same components, forms or ideas which are the same or are similar in a sentence. It adds rhythm to the sentences and helps in specifying the ideas more because it involves repetition of ideas or words. The repetition of the words in the lines or parallelism makes an idea or argument more specific and clearer.