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". 

Input: Consider 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.

Output: D


Input: Consider Input: [header] How to format an ipad [title] Head to the home screen. [step] Press the home button of your ipad to go to your home screen. [title] Access the general settings menu. <sep> (A) [step] At the bottom of the screen, scroll down until you see " general settings. " [substeps] Scroll down until you see " general settings. (B) [step] Look for the settings app on your device, and click it. [substeps] Alternatively, you can tap on " general. (C) [step] Tap on the " settings " icon then select " general " from the options in the settings menu. [title] Tap on " reset " at the bottom-most part of the screen after pressing " general. (D) [step] Use this screen to change your location menu to default to icloud. [substeps] To enter your location menu, tap the settings app from the screen.

Output: C


Input: Consider Input: [header] How to get police dog insurance [title] Identify the type of policy you want. [step] There are three kinds of insurance you could purchase for police dogs. You should begin by deciding which kind of coverage you want. <sep> (A) Shop around for other policies so that you can see what they specify. Other policy options include : [substeps] Account for costs of personal injury, such as injury or property damage. (B) Generally, you can get : [substeps] Insurance that covers treatment for an animal's injuries. Police dogs generally need more coverage than what is offered by traditional pet insurance, which usually doesn't cover illnesses or injuries a police dog would suffer in the line of duty. (C) [substeps] Policycast (available over the phone) is the most common coverage during peacetime. You probably won't use regular policycast, but if you do, get two licensing bodies of a different type of coverage. (D) [substeps] Most policies are created in 2010, and there are three parts to the policy: policy number. The policy number shows how much of the policy you are attempting to cover.


Output: B