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". 

Example Input: [header] How to change a drill bit [title] Loosen the chuck. [step] The chuck is piece on the end of the drill that loosens and tightens to hold the bit. Grasp the chuck with one hand while you hold the handle of the drill with your other hand. <sep> (A) Loosen the chuck by sliding the drill bit along one side. If you have known it already, it will already be loose, but there is a screw on the end of the piece that holds the bit in place. (B) Use extra leverage as you slowly press down on the chuck to loosen it. [substeps] Keep your eye on the chuck while you are tightening it. (C) Twist the chuck counterclockwise to loosen it. Another option is to pull the trigger gently while holding the chuck. (D) Begin to tighten the chuck by turning it clockwise so that the chuck remains firmly in place. Use your wooden allen or long-handled allen key to turn the chuck clockwise until it is firmly within the drill's circle.
Example Output: C

Example Input: [header] How to make homemade hormone rooting powder or tonic [title] Use cinnamon. [step] Cinnamon prevents the growth of fungus. While it acts less as a rooting hormone, the fact that it curbs the fungal growth means that the plants have a great chance to grow without needing any additional help. <sep> (A) [substeps] Consider adding cinnamon powder to your herbal tonic each day by mixing small cinnamon cubes with water and using them for a week. [title] Try using flakes of dried marigolds. (B) [title] Try a silicon tablet or cacao tablet. [step] They can last up to a week, but commercially available forms are fast-acting. (C) [title] Dip or roll the cutting in ground cinnamon. [substeps] If dipping, tip some cinnamon into a cup and simply dip the cut stem end into the cinnamon. (D) Make sure that you use cinnamon in conjunction with regular root growth products, as cinnamon provides an excellent additive that can help regulate the risk of fungal infections. [substeps] Make sure that you use cinnamon on plants that are not affected by herbaceous or fungal infections.
Example Output: C

Example Input: [header] How to install a faucet [title] Gather the right materials. [step] Special plumber's tools aren't required, just a few basic tools you may already own. Have a small bucket to catch residue water and a plastic drop sheet to keep the bottom of the cabinet dry in case of a leak or spill. <sep> (A) Make sure the level is level and there isn't clutter in the sink. [substeps] Plumber's tools is a few feet larger than a beer can, not a 40 gallon (59.4 l) bucket and is heavier than a dry ice bucket. (B) [substeps] In addition to the tools, you will also need about 1 gallon (3.78 liters) of water and of course, a lid. The base counter needs to have both water and a drop sheet. (C) If you don't have a drop sheet and painter's tape, see the next step. [title] Locate the faucet on either side of the sink. (D) Choose a faucet from the hardware store, and follow the manufacturer's instructions. A basin wrench is useful for this, but standard wrenches or pliers will work just fine.
Example Output:
D