Final answer:
Option (b) - 'Hand hygiene is essential before and after patient contact.' is the statement that demonstrates an understanding of proper hand hygiene.
Step-by-step explanation:
The statement by the AP that demonstrates an understanding of proper hand hygiene is option (b) - 'Hand hygiene is essential before and after patient contact.'
Proper handwashing is critical in a clinical setting to prevent the spread of pathogens. Health-care workers should wash their hands thoroughly between every patient contact, after the removal of gloves, after contact with bodily fluids, and before and after assisting a surgeon with invasive procedures.
By following these guidelines, health-care workers can help reduce the risk of infection transmission and ensure patient safety.