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".

Ex Input:
[header] How to warm a horse's bit [title] Dunk in hot water, then wipe dry. [step] Heat water until it's just begun to steam, then bring it over to the stall in a bucket. Place a safety hook over the bucket and drape the bridle over it, making sure not to let the leather touch the water or the ground. <sep> (A) Dunk the bit for 10-15 seconds in hot water, or 1-2 minutes in lukewarm water. Wipe the bit down with a cloth to dry it. (B) Try to keep your head at least six inches from the water. The halter and bridle should be crimped, not tightened, to avoid fraying. (C) [substeps] You don't want the bridle to get hot. If this happens, you need to bring a band-aid or thick covering of newspaper over the cloth. (D) Smooth out any wrinkles so the bridle stays in place. [substeps] When you go to wash the bridle, look in the mirror to see if it fits.

Ex Output:
A

Ex Input:
[header] How to plant switchgrass [title] Pick a switchgrass variety. [step] If you look for switchgrass at your local nursery you may just find a plant that's labeled " switchgrass, " but there are actually several varieties that differ in color and size. Switchgrass blooms for almost half the year, and during the winter and spring it's usually brown. <sep> (A) [substeps] Magnolia trees produce about 50% of the moisture. Maple trees produce 50% of the moisture per year. (B) Both varieties of switchgrass produce pretty stunning flowers, unique patterns, and flowers. Most also have phlebotomists at the planting areas where it grows. (C) These are factors to keep in mind when you're choosing a variety for your garden. Here are a few types commonly grown in home gardens : [substeps] Northwind: grows four to six feet tall and produces yellow blooms. (D) Pine needles will establish a base that's ready for planting a newer, more established fire from. [substeps] Switchgrass colors for more variety can also be found at a garden center or online.

Ex Output:
C

Ex Input:
[header] How to use bubble wrap [title] Use bubble wrap to protect delicate items, like glass or electronics. [step] Bubble wrap is ideal for padding glassware, ceramics, mirrors, and other fragile items while moving. Because bubble wrap comes in large sheets, it can be more effective for wrapping bigger items than styrofoam or newspaper. <sep> (A) [substeps] If it's not light enough for your bubble wrap, you can twist or simply press the ends of the bubble wrap together. [title] Place an ice pack on the spill. (B) [title] Wrap all delicate items before putting them in the box. [step] Place your item on a sheet of bubble wrap and cut out a piece long enough to cover the item in bubble wrap. (C) It also helps protect your items from dangerous particles. [substeps] Bubble wrap does not contain the same polymers that foam bath sheets, or these can solidify and shrink in water before use. (D) [substeps] Read a section on making bubble wrap from a variety of perspectives, so you have a comprehensive understanding of exactly what you're making. [title] Pack your bubble wrap in a cooler.

Ex Output:
B