A)Is unaware that material has entered the airway
B)Is aware that material has entered the airway but attempts to hide this from his family and medical staff
C)Produces an inaudible cough in response to material entering the airway
D)Is aware that material has entered the airway but cannot cough to clear it

A)Types of foods Mr.Ho is willing to eat.
B)Level of risk for aspiration.
C)Impact of culture on treatment.
D)Extent of neurological impairment affecting Mr.Ho's swallow.