Which revision most effectively corrects the faulty parallelism in this sentence?

the novel is about a woman who is young, poor, and works hard.
a. the novel is
about a young poor woman and how she works hard.

b. the novel is about a woman who is young, and she is poor and works hard.

c. the novel is about a woman who is young, poor, and hardworking.

d. the novel is about a young poor woman and why she has to work hard.