According to the Rules and Regulations Under Medicare, What Activities

According to the rules and regulations under Medicare, what activities can a physical therapist aide provide in the clinical setting?

A) Prepare the treatment area prior to the patient's arrival.
B) Apply ultrasound to the patient's back once the PT/PTA has prepared the settings.
C) Instruct the patient in the home exercise program once it has been developed by the supervising therapist.
D) Give the patient different weights when those being used are too easy.