Which of the Following Is the Biggest Downside for Large

Which of the following is the biggest downside for large job sites?

A) Most job sites do not return with quick results, which can be frustrating for the applicant.
B) The sheer size and lack of differentiation is threatening to make job sites obsolete.
C) Job sites offer lackluster customer service which is a huge disappointment for applicants.
D) Most job sites post jobs that are unrelated to an employee's expertise and job interest.
E) While they promise excellent service, the exuberant service charges discourage applicants from using job sites.