An internal audit function is charged with measuring the compliance of the organization's human resources area with applicable laws, regulations, and internal policies. Which of the following objectives would be appropriate for this engagement plan?

a. To ensure that applicant pools represent a fair cross section of the population

b. To assess the process used by human resources to respond to employee complaints

c. To establish proof of citizenship by requiring a birth certificate

d. To question recently hired employees to assess compliance with the interviewing process