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 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.
Example output: D
Example explanation: This is a good example. Only option D is about Christmas trees. So, it's the correct option.
Q: [header] How to treat poison sumac [title] Take a cool shower immediately. [step] Urushiol oil takes about 30 minutes to enter the skin. As soon as possible after you've come into contact with the plant, take a shower with soap and cool water. <sep> (A) This soaks up the excess moisture and makes your skin look fluffier. [title] Wear some sunscreen with spf 15 or higher. (B) Then, unplug the plant and wash your hands vigorously. [substeps] If you're a beginner to using soap, it might be beneficial to take a test kit ahead of time to see if you have the proper conditions or microbes to use on your plant. (C) This will help to eliminate the bacteria that settle in the sumac seeds. [title] Spread the sumac oil directly on the affected skin. (D) Even if you miss the 30-minute window, showering will remove the oil from your skin and prevent the poison sumac from spreading. [substeps] Avoid hot water, which will increase irritation.
A:
D