Final answer:
Using flex cuffs around the neck is strictly prohibited as it poses a risk of asphyxiation and serious injury. The correct method typically involves applying them to an individual's wrists while avoiding excessive tightness to prevent harm.
Step-by-step explanation:
The correct option to the question "Members may not use flex cuffs how" is D) Around the neck. Flex cuffs, also known as zip ties or cable ties, are commonly used by law enforcement and military personnel as a temporary method of restraint. However, for safety and humanitarian reasons, these restraints must be applied in a certain manner to prevent injury or violation of a person's rights. Using flex cuffs around the neck is strictly prohibited because it can cause asphyxiation and severe injury. Generally, when utilizing flex cuffs, officers are trained to use them on an individual's wrists and ensure they are not too tight to cause harm.