Given the task definition and input, reply with output. In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D". 

[header] How to change valve springs [title] Locate the coil packs on the drivers side valve cover. [title] Disconnect the spark plugs. [step] Beginning with the forward most coil, trace the spark plug wire down to the spark plug. <sep> (A) The ignition switches at the coil, and the ignition switch is usually labeled as " it. " [title] Use the utility knife or similar tool to cut the spark plug wire, exposing the coil. (B) Some designs may require you to unscrew these already disconnected, removing any safety components on the head of the spark plug. [substeps] These are usually linked together in a bravrig with attached ignition cylinders on the rear. (C) Remove the wire from the spark plug by firmly grasping the boot at the end of the wire and pulling on it. Let the plug wire dangle from the coil. (D) [title] Use the wire strippers to cut the spark plug wire at the drilled area. [step] Check to see if the spark plug wires in this diagram are where you need them.

C