Final answer:
When applying anti-embolic stockings, a Certified Nursing Assistant (CNA) should stand at the side of the bed, at the level of the patient's knees, while ensuring the patient is in a supine position.
Step-by-step explanation:
When applying anti-embolic stockings, a Certified Nursing Assistant (CNA) should ensure that the patient is in a supine position, lying flat on their back. The CNA should stand at the side of the bed, positioning themselves at the level of the patient's knees. This allows for better reach and control when applying the stockings.