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 use psychology to close more sales [title] Give something for free. [step] The principle of reciprocation is a psychological phenomenon described by dr. robert cialdini, an expert in persuasion. According to this theory, it is part of human nature to feel obligated to repay debts of all kinds, big and small. <sep> (A) To begin this process, ask yourself if you really are willing to sell something for free. If you are willing to throw in the money, then you are probably willing to take credit. (B) You can't force anything on someone else. [substeps] If you " feel " obligation to a friend or loved one, give them something to ask you " if i use this method, what will happen? " [title] Assemble your argument. (C) If someone receives something free, they will feel a psychological urge to purchase a product to pay you back for your kindness. [substeps] Offer a free trial period, a sample, or even a pleasant experience. (D) To do this you must pay for or at least accept the full offer. After that you must devise a plan of compensation.

Output: C


Input: Consider Input: [header] How to create a character driven book [title] Focus on character wants and needs. [step] In a character driven book, your character's wants and needs should be of upmost importance. Oftentimes, the primary action of a character driven book involves how a character's wants, needs, and opinions change over time. <sep> (A) An act driven author should cover the character and put meaning into his or her actions and preferences. [substeps] Character driven books often have no plot, characters, qualities, or arguments, and do not have a central theme or topic. (B) As you begin to carve out the basics of your book, spend some considering what your characters want. [substeps] All characters should yearn for something. (C) This will make the book more difficult to write and will keep your books focused on character drives. [substeps] While most authors choose to focus on character wants in the following steps, correct as necessary. (D) [substeps] Pay attention to your character's needs as opposed to opinions and needs. Ask yourself if you believe this will help you determine whether your character will be driven to action, or whether you believe he or she will push past any restrictions.


Output: B