The Nurse Instructs a Patient with Chronic Obstructive Pulmonary Disease

The nurse instructs a patient with chronic obstructive pulmonary disease (COPD) on the huff cough technique. Which observations indicate that teaching has been effective?

A) The patient coughs twice.
B) The patient leans forward.
C) The patient makes a huff sound when exhaling.
D) The patient inhales through the nose with the mouth closed.
E) The patient places one hand on the abdomen and the other on the chest.