What is a choke hitch and when is it appropriate to use it in rigging?

What is a choke hitch and when is it appropriate to use it in rigging?

• A. A rope hitch that tightens around the load; useful for securing a load with a small lifting point but can slip under load, so not for critical lifts
• B. A knot used to join two ropes
• C. A device for measuring load
• D. A type of hook used in rigging

Answer: (C)