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 use a glue gun [title] Consult the owner's manual. [step] Go over the owner's manual for information about safely operating your glue gun. Take note of the different components of the glue gun and how they're supposed to function. <sep> (A) It is always best to check the manufacturer's instructions for each components and work with one to get an idea of how to operate the glue gun properly. [substeps] If your model is something like lvl, a glue gun may have a manual that includes safety information. (B) If you're not sure about the model, you may want to explore the topics available on the manufacturer's website or ask the owner if they offer any warnings. [substeps] Refer to the diagram of the glue gun before purchasing it for detailed information about how to operate it. (C) The instruction manual should be able to tell you whether your glue gun will begin heating up automatically or needs to be turned on and off, how long it typically takes to warm up, and what materials it's recommended for. [substeps] Be sure to read through the safety warnings carefully to reduce the risk of accident or injury while using the glue gun. (D) Should it come loose or malfunction, speak to a customer service representative who will set the parts to work-in a safe way. Some small items that are closely related or work differently may not need to be inventoried and set aside.
A:
C