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". 
One example is below.
Q: [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.
A: D
Rationale: This is a good example. Only option D is about Christmas trees. So, it's the correct option.
Q: [header] How to act when you find gas leaking in the kitchen (usa ) [title] Determine the danger. [step] The safety of people is always the first thing to consider, so heed the following first of all : [substeps] If it is difficult to breathe or the smell is very strong or you can hear a loud sound of escaping gas leave the kitchen immediately and get any other people out of the building. Do not turn on light switches in or around the kitchen. <sep> (A) Put on protective clothing and a respirator if possible. Consider keeping a friend or family member home with you while you search for gas. (B) Do not eat or drink, and do not go in the kitchen if unsafe. [title] Separate all of the people in your home. (C) Do not turn any electrical switches on or off, including doorbells. Do not use matches or any other naked flames. (D) Stay near the side of the kitchen where gas leaks are more likely to happen. Check to make sure the door is closed and no one is around.
A:
C