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 unblock a toilet when you have no plunger [title] Cover the end of a mop with a plastic bag. [step] Pull the bag over the end of the mop. Then, tie it off or secure it in place with a rubber band. <sep> (A) You can also use a rag or a toilet cloth to help secure the bag if you don't have a mop. [substeps] Try using empty containers to provide more protection. (B) After securing the handle of the mop, throw it away. [title] Turn on the water faucet. (C) [substeps] Discard any waste that falls from the end of the mop. [title] Use the bucket or bowl to catch any urine that spills out. (D) [title] Plunge your toilet with the mop. [step] Use a forceful in and out motion like you would with a normal plunger.

Output: D


Input: Consider Input: [header] How to avoid common glass tile installation mistakes [title] Ensure color consistency behind glass tile. [substeps] Since glass can be the sole material in an installation, it is essential to choose a bonding mortar that meets its unique demands. In most cases, the color of the thin-set mortar was not an issue when installing opaque ceramic tile. <sep> (A) But with clear and translucent glass, the mortar appears through the tile: if the color varies in the mortar, it will in the glass tile too. To eliminate variations across a glass tile installation, choose a glass tile mortar with a bright white shade that is controlled to a consistent standard color. (B) [title] Find a masonry solution solution as described in this article. [step] Masonry solutions used to be sold in commercial suppliers were expensive and less durable than those containing glazed portions. (C) [title] Check your online repair and installation guide for common glass tile installation recommendations. [substeps] If you cannot find the recommended measurements, consult the manufacturer's website or consult the recommended supplies list. (D) Spray glass tile debris on the glass tile before continuing. Rinse glass tile debris with water and wipe the water away.

Output: A


Input: Consider Input: [header] How to cook halibut [title] Gather your ingredients. [step] You only need a few simple ingredients to make a healthy and delicious broiled or grilled halibut. Here's what you need : [substeps] Halibut steaks olive oil or melted butter minced garlic salt and pepper lemon wedges [title] Marinade overnight if desired. <sep> (A) [step] The longer you marinade the halibut, the more it will need time to cook. Unfortunately, immediately marinating the halibut overnight is not an option. (B) [title] Turn on the broiler to heat your oven. [step] If you're grilling your halibut, light your grill. (C) [step] The best time to marinade allows the flavors to seep into the meat, softening it, and speeding the cooking time more. To marinade, place the food in a pan or food dish. (D) [step] For a marinade, all you have to do is place the fillets into the hot oil and let them marinate overnight. A double boiler or over a high flame is perfect, but any temperature can suit you.


Output: B