Which observation indicates to the nurse that a patient with quadriplegia spouse understands performance of assistive coughing (quad cough)?

The spouse assists the client into a wheelchair and coaches deep coughing.

The spouse assists the client into high-Fowler position and encourages taking a number of deep breaths.

The spouse places hands on the client's lateral chest and pushes inward on exhalation.

The spouse places hands below the client's diaphragm and pushes upward with exhalation.