Given the task definition, example input & output, solve the new input case.
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: [header] How to create a christmas tree forest [title] Consider the type of tree you want to plant. [step] There are a wide variety of christmas trees and include fir, pine, spruce, cypress, and cedar. These trees thrive in different climates and look different from one another. <sep> (A) It is important to research the tree before setting up your tree to try it out to make sure you can write the tree's growing season so that you can get the most supplies you need. If you're just interested in having a tree stand out, then make sure to check for the following : [substeps] Spruce trees. (B) [substeps] Trees green may be used in a mix of green and evergreen. Greens, such as pintos and olive oil, may be more delicate than these. (C) Where the trees grow together is up to you. [substeps] Spruce trees light up the night for hours in the morning and drown out the morning sunrise between afternoons. (D) Think about where your tree forest will be located and choose a tree that can thrive in that climate. [substeps] Balsam firs are a popular christmas tree species that grow in the northern united states and canada, in hardiness zones 3-5 or states like minnesota, north dakota, and montana.
Output: D
This is a good example. Only option D is about Christmas trees. So, it's the correct option.

New input case for you: [header] How to oxidize a gummy bear [title] Wear eye protection (goggles or lab glasses), a lab coat, nitrile gloves, and a face mask. [title] Wear pants that cover the entire leg. [substeps] Shorts or skirts are not acceptable. <sep> (A) Understand that if you intend to cook your bear, you must wear either pants, skirts or leggings in preparation. [title] Cook on high heat for 20 minutes and add one tablespoon of soy sauce. (B) Avoid denim, since it can dull the coloring if you use this very often. [title] Put a shoe or step onto the inside of the can, this will open up more vapor. (C) A pinwheel enthusiast does not wear any shorts. [title] Cover the hands with plastic clamps. (D) [title] Wear only closed toed shoes that cover the entire foot. [substeps] Sandals or open-toed shoes are not acceptable.
Output:
D