Answer: The correct answer is "A. Rene, who has a disability, is rejected from a job position because another candidate did not have a disability.".
Explanation: Disability discrimination occurs when an employer treats a qualified person with a disability, who is an employee or job applicant, unfavorably because he has a disability.
While in the case of option B, the law requires an employer to provide reasonable accommodation to an employee or job applicant with a disability, this is not mandatory if doing so will generate significant difficulties or expenses for the employer.
Therefore the case of option A would be considered a situation of legal employment discrimination.