In the Context of Job Searching, Building a Network of Contacts

In the context of job searching, building a network of contacts refers to:

A) collecting the phone numbers of people one meets during social interactions.
B) building relationships with classmates and professors who can help one find work.
C) building a strong relationship with a group of people who are closest to a person.
D) finding people who have completed or are pursuing internships.
E) getting in touch with people who are currently looking for a job.