Final answer:
The correct starting position for wrapping an elastic bandage on the lower extremity to reduce edema is at the ankle, as it provides the foundation for proper compression and circulation.
Step-by-step explanation:
When applying an elastic bandage to reduce edema in the lower extremity, it's crucial to start at the base of the extremity and work your way up to ensure proper compression and circulation. Therefore, the correct answer is D. At the ankle. Starting the wrapping at the ankle provides a foundation for graduated compression, helping veins return blood back to the heart more effectively. This technique also emulates the pressure provided by specialty stockings, such as those recommended for long-haul flights to prevent blood accumulation and swelling, similar to strategies used by soldiers to avoid fainting during prolonged periods of standing.