Which of the features of automatic toothbrushes is most likely to be helpful for patients with physical disabilities?

Question

Quizplus · Accepted Answer

Automatic toothbrushes have larger handles that contain a rechargeable battery.The larger handle makes them useful for patients with physical disabilities.
Some types of automatic brushes have a timing device that sounds every 30 seconds to remind the user to change quadrants in the mouth.
Some models of automatic toothbrushes feature pulsating and ultrasonic action.
Automatic toothbrushes use one of several motions,including back and forth,up and down,or circular.

Which of the Features of Automatic Toothbrushes Is Most Likely