I think the correct answer is B. Using general subjects and masculine and feminine pronouns are ways to avoid gender biased language. General subjects can pertain to a male and female. Also, including both masculine and feminine pronouns in a statement will aid gender equality.
Answer:
I believe it would be A, I'm pretty sure
Explanation:
I would say the first one
I would say B. C could also be an option, but I think B makes the most sense :)