Sally worked at a dentist office. She had to work late. What might have caused her to work late?\nOptions:\n- office building\n- town\n- patient\n- michigan\n- office desk
Please answer the following question by reasoning step-by-step.
patient
Patient is a person receiving or registered to receive medical treatment.

Sally worked at a dentist office.

She had to work late.

Patient might have caused her to work late.

.

So, the answer is patient