Which Statement Best Describes the "Hidden" Job Market

Multiple Choice

Which statement best describes the "hidden" job market?

A) accounts for a small number of jobs and should, therefore, be considered a secondary resource
B) accounts for up to 80 percent of all positions available at any given time
C) has become unimportant since online job boards provide millions of job listings
D) makes it difficult to find a job because companies keep job openings a secret