Answer:
d. All the three selection devices
Step-by-step explanation:
Civil Rights Act 1991 was an amendment of Civil Rights act 1964. It restructured, restored the act as a strengthening mechanism against skin colour discrimination in employment sector. The legal framework provided strict rules & regulations against any type of employment discrimination, at any stage of recruitment, selection, further procedures.
So, If the employer were sued because selection process had a disparate impact on blacks, the Civil Rights Act of 1991 states that the employer must demonstrate the job-relatedness of all the employment aspects : The interviews, The reference checks, The employment tests.