Answer:
both of them are important.
The third one, roundabout answer.
Answer:
Caused by disputes over trade, the war began with English attacks on Dutch merchant shipping, but expanded to vast fleet actions. Ultimately, it resulted in the English Navy gaining control of the seas around England, and forced the Dutch to accept an English monopoly on trade with England and her colonies. (from google btw)
Explanation:
A. is the most sensible answer tbh, the librarian is inside a library she/he wouldn't really pay attention to kids. Books on gender roles may be in there a bit but not completely since it won't really talk about what you're trying to search for. Articles on phycology definitely isn't going to helped learn about children on the playground.
I would think the answer is B, hope i could help. :)