Detailed Instructions: 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".
Q: [header] How to make a magnetic induction battery charger [title] Get some rechargeable batteries. [step] Non rechargeable batteries will explode if charged. [title] Go to an electronics hobby store and buy the following items : [substeps] Battery holder for the type you wish to charge electrical wiring, preferable uninsulated, but if it isn't you need to strip the insulation off. <sep> (A) Batteries will usually always have an attachment, usually they attach on to the centre of the battery carrier. A backup circuit for when there is an emergency, without them attached not only gives it power but also helps your battery last longer. (B) Begin by soaking and pressing the battery with a circular or pebbles coloured gel. Feel the cooling it and remove the 4 plastic screws holding it in place. (C) [title] Now you will need to acquire these mechanical parts. [substeps] A hand crank something to mount the hand crank to, but make sure it can still rotate. (D) Wire gloves, polyurethane-clear plastic tubing, wire cutters, pliers, and masking tape. Triple screw onto-auto fitting charger.
A:
C