If Someone Charges That a Job Application Is "Biased" Against

Multiple Choice

If someone charges that a job application is "biased" against people with poor eyesight,what evidence would be most important for evaluating that claim?

A) How many people with poor vision get good ratings on the job application?
B) Do people with poor vision fill out the job application the same way if they do it twice?
C) How many people with poor vision manage to get jobs at this company?
D) Does the application accurately predict job performance for people with poor vision?