Final answer:
The client statement that indicates an understanding of preventing pneumonia in COPD is to wash hands frequently and avoid crowds.
Step-by-step explanation:
The client statement that indicates an understanding of preventing pneumonia in COPD is option D) I will wash my hands frequently and avoid crowds when possible.
Preventing pneumonia in COPD is essential because respiratory infections can worsen the condition. Washing hands frequently helps reduce the spread of germs that can cause pneumonia, while avoiding crowds minimizes exposure to pathogens. Both measures are important in reducing the risk of developing pneumonia for someone with COPD.