More Jobs Today Are Found Through Referrals and Person-To-Person Contacts

Multiple Choice

More jobs today are found through referrals and person-to-person contacts than through any other method. That's because 

A) people hired through referrals tend to demand lower salaries.
B) using online sources to search for job candidates is completely worthless.
C) people trust what they know and want to hire known quantities.
D) of all of these reasons.