instruction:
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". 
question:
[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.
answer:
C


question:
[header] How to survive flight attendant training [title] Pack enough of all the essentials you will need to make it through an extended trip while maintaining a professional appearance. [substeps] Unless otherwise specified in your correspondence from the airline, bring business attire for classroom and training sessions. Bring business-casual attire for down time. <sep> (A) This includes a sweater, gloves, sensible footwear for long car rides, and a carry-on book for your reading habits. First, bring jackets, pants and boots. (B) Some airlines may provide you with a uniform during training, so you won't need to pack as many of your own clothes. Bring anything that will help you have more comfortable and restful sleep, like an eye mask, your own pillow and calming music. (C) Even a range of items such as a fishing belt and sneakers are most effective during this time period. If you know your plane has a get-together with close friends and family, bring along some casual clothes to dress up for your flight. (D) Don't pack clothes that are too formal, too casual, too old-school. The point of switching schools is to have a better idea of what you need to wear.
answer:
B


question:
[header] How to crush peanuts [title] Unshell some peanuts and put them in a freezer for several hours. [step] Make sure they're cold so they have an easier time getting crushed in the food processor. [title] Pour 1 cup (. 2 liters) of the cold peanuts into a food processor. <sep> (A) [step] If you're using chicken or beef peanuts, make sure it's easy to work with. The shell will be less sticky if the peanuts are packed in tightly so go slowly. (B) [step] Pulse the peanuts for about 3 minutes until they become crushed. [title] Place a cheese grater or parmesan on the cutting board. (C) [step] Crush one cup of peanuts at a time to avoid unevenly-sized pieces. [title] Put the lid on the food processor and hold down the pulse button. (D) [step] Remove the lid from the processor and open it at the bottom to mix all the peanuts in at once. [title] Press the peanuts firmly together until they are well coated.
answer:

C