Which of the following actions is NOT performed prior to coupling procedures?

Answer: B — Back up until you hear a click

The action of backing up until you hear a click is related to the coupling process itself, rather than a preparatory action that should be performed before coupling. Proper coupling procedures typically include aligning the tractor with the trailer, ensuring that the area around the coupling site is secure, and inspecting connections for any signs of damage or wear. These steps are vital for safety and proper function before actually engaging or coupling the two vehicles. Backing up until a click is heard indicates that the coupling mechanism has engaged, which happens during the actual process of coupling, not before it. Therefore, this action does not belong in the list of pre-coupling tasks, making it the correct choice in this context.