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 pick a healthy sugar glider [title] Find a breeder. [step] If you want a sugar glider, your best option is to find a breeder. Breeders work specifically with sugar gliders and will have more knowledge about how to care for them, therefore increasing the risk of you obtaining a healthy pet. <sep> (A) [substeps] When visiting a breeder, look at their food and water dishes regularly. Good breeders will tell you how often and provide you with other food and water containers. (B) [substeps] Ask other breeders at local pet stores about their experience handling sugar gliders. If you want a sugar glider in your home, you'll want to make sure they have a dry skin. (C) [substeps] Finding a sugar glider breeder can be difficult. It's not as easy as finding a breeder for a particular kind of dog as there are few specific networks for breeding sugar gliders. (D) [substeps] If you will have a sugar glider in your home, breed it from their own genetics and pedigree, not the other way around. Don't get a sugar glider that has a steady and well-structured life.
Example Output: C

Example Input: [header] How to introduce a pleco to a goldfish tank [title] Ask how large the pleco will grow to be. [step] Although most pet stores will sell plecos that are only a few inches in length, you should know that they can grow quite large. Fully grown plecos can reach up to two feet in length. <sep> (A) [title] Check your tank's surface before you place the pleco into the tank. [step] Make sure that your aquarium is opaque or has a drop-down tray so that your pleco is not exposed to water. (B) This can have a negative impact on their lifespan. [title] Choose a tank with large walls and no air holes. (C) [title] Make sure you cover more than twice the tank. [step] If you find that your pleco grows too much, cover the entire tank with a blanket. (D) The exact size of the pleco will vary depending on the species. Ask someone at the pet store how large the pleco will get before making a purchase.
Example Output: D

Example Input: [header] How to take and print photos that look like photo booth pictures [title] Get your device and open the camera app. [step] Set it to the front-facing camera (the webcam). [substeps] If you have a regular camera and a tripod, then use the regular camera. <sep> (A) You only need to press and hold the shutter button for at least 30 seconds (or click and release the button) to take a picture. If not, get the assistant to either bring up pictures for you or point them out to you. (B) [title] Use the screen to control where you are zooming. [step] Zoom to one part of the screen at a time. (C) Put it on the tripod and set it so it takes the photo after 5 seconds. The photos will be more stable and you'll have extra time to get ready. (D) With a tripod, the photo booth camera (which can be set to whatever style you prefer) has two slots, one just for backing up parts. Though you can use flash to greatly increase the zoom capabilities, you won't be able to zoom at optimum magnification.
Example Output:
C