Final answer:
The nurse should intervene if the nursing assistant allows the gait belt to slide up onto the patient's ribcage.
Step-by-step explanation:
The correct response that should cause the nurse to intervene is option C, allowing the gait belt to slide up onto the patient's ribcage.
A gait belt is a safety device used to assist in the safe transfer and ambulation of patients. It is placed around the patient's waist in order to provide support and stability.
If the nursing assistant allows the gait belt to slide up onto the patient's ribcage, it can result in discomfort or even injury to the patient. The gait belt should be positioned snugly around the patient's waist, not too tight or too loose, so that it stays in place and provides the necessary support.