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 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.
Example Output: C

Example Input: [header] How to play sepak takraw [title] Set up the court. [step] The court is rectangular and measures 13. 4 meters by 6.1 meters, approximately the same size as a badminton court. The net is in the middle of the court and should be 1.52 m high. <sep> (A) [substeps] The court runs on one side of the lower part of the court. It is normally used between three or four rows, to remove knee-guards and to protect the entire court from any further slugs (skeletons or other animals). (B) On the inside of the court, you'll see rows and rows and elevated 18 x 19 meters by testing a platform. If you don't expect to play every day, you'll still be able to play as much as you want. (C) A service circle should be drawn 3.05 m from the back line and 2.45 m from the sidelines. The radius of the service circle should be 0.3 m. (D) You should place your face-plates face down on each side of the court, like you are a goldfish. You can also drop your finger or both of your hands on the court's edge and play.
Example Output: C

Example Input: [header] How to become an architect in canada [title] Study architecture at a college (or university) and obtain a bachelor's degree or master's degree. [step] Education is an important factor for becoming an architect. Make sure your chosen program of study has been approved under the canadian architectural certification board (cacb) before you enroll. <sep> (A) You can also register at a college or college to test your knowledge. [substeps] Architecture university offers courses on subjects you're already familiarizing yourself with. (B) [substeps] If you do not already have a bachelor's degree, you can find a colleges or universities near you by searching online. Alternatively, contact your college or university's architectural admin to see if there are any accredited degree programs near you. (C) [title] Complete a degree at your school of choice. [step] The schools that you are admitted into, in countries like canada, in the european half of the world, are accredited for help in finding a college of your choice. (D) [substeps] Complete the syllabus program offered by the royal architectural institute of canada (raic) as an alternative way to become an architect. [title] Gain 5 , 600 hours of work experience.
Example Output:
D