I recently tore the cartilage in my right knee , and had surgery . I was prescribed Hydrocodone for the pain before the surgery but complained about not being able to sleep . So after the surgery my Dr. prescribed Oxycodone .

Available choices:
A). Their finger was cut off in an industrial accident ..
B). They broke their ankle in a fall ..
C). None of the above choices ..
D). They badly injured their knee ..
Q: What must have happened before the person required surgery ?
D).