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".
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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 eat to improve fertility [title] Be aware that having a balanced, healthy diet does not guarantee higher fertility. [step] There are many online sources and several books that claim that switching to a more balanced and healthy diet can lead to improved fertility. Though it is always beneficial to eat a healthy diet, it should not replace other fertility treatments and options. <sep> (A) Making sure that you are eating adequate and not too many calories or trans fats can lead to strong, lasting health patterns. In order to see results, eating a balanced diet is essential. (B) The key to avoiding eating more fertility treatments is truly taking in proper nutrients and the exercises you perform regularly. [substeps] Vitamin b6, vitamin b12 and high quality foods like bread and fruits help you to relax and begin functioning properly. (C) [substeps] Healthcare providers believe that we often mistake pre-existing disease as the cause of our fertility problems. These people often mistake their diet as their only sources of positive energy. (D) However, maintaining a healthy diet and lifestyle may reduce a woman's risk of irregular ovulation and could improve her chances of getting pregnant. [title] Keep in mind fertility diets may only work for a small subsection of women.

Answer: D

Question: [header] How to get rid of self harm scars [title] Try a silicon gel sheet. [step] A silicon gel sheet is an adhesive patch that is applied to the scarred area. These can be used to reduce the appearance of scars within 2-4 months. <sep> (A) [substeps] Be aware that silicon gel sheets are not very effective in treating self-harm scars on the body. There is no scientific evidence that it works as well as it needs to. (B) Wear a silicon gel sheet on your scarred area for at least 12 hours every day for 2-4 months. [substeps] Studies show that silicon gel sheets can also help flatten scars. (C) These kits usually require that you wash the entire area with soap and water, a towel, cotton ball and some warm water. Get 7-10 sheets of silicon gel sheets and not more. (D) The chemical solution to these products is a squirt and you apply it to the scarred area on a daily basis. To apply the gel, follow the directions on the packaging.

Answer:
B