Answer:
the school where Cindy works
Step-by-step explanation:
According to the rules created by Occupational Safety and Health administration, incidents that occurred toward the employees within the workplace environment or employer's premises are presumed to be work related.
Since Cindy sprained her wrists during her job, this can be related as a work-related injury or illness. Because of this, the employer will be the one that is responsible in paying Cindy's medical Bill. In this case, the employer is the school.