d. Empiricism
As empiricism is basically an experience derived from senses. So here through the text we can see that empiricism is very evident.
Answer:
External source of recruitment
Explanation:
Internal source of recruitment does not provide new blood as it implies re-hiring, promoting, or transferring persons who are already working or have worked for the company. So, external source of recruitment is needed to bring <em>new blood</em> into the organization. That can be achieved in multiple ways, as the external source suggests people joining the organization through recommendations, then there are employment agencies whose occupation is finding all sorts of candidates. Also, companies can visit schools and colleges in order to find new candidates. Companies can advertise job positions to the wide public, they also can hire candidates who are not so skilled right now, but can learn in the future. So, there are some of the most spread ways of finding new candidates and bringing <em>new blood</em>.
The first sentence is correct and the second sentence is a fragment.
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.
