How Will an Understanding About the Onset of Symptoms Help

How will an understanding about the onset of symptoms help the therapist?

A) It will allow the therapist to determine what structures might be involved based on the mechanism of injury.
B) It will allow the therapist to determine what structures might be involved based on the location of the symptoms.
C) It will allow the therapist to determine what structures might be involved based on the description of the symptoms.
D) It will allow the therapist to determine what structures might be involved based on the positions that alter the symptoms.