Which of the Following Is the Easiest Way for Recruiters

Multiple Choice

Which of the following is the easiest way for recruiters to easily and accurately track responses to advertisements in various media while maintaining a large applicant population?

A) Using only a few media sources for recruiting
B) Asking applicants where they learned of the job opening
C) Asking applicants about their experience with various media sources
D) Using different contact names, e-mail addresses, or phone number codes in each advertisement