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". 

Q: [header] How to be happily married [title] Don't expect your happiness to be derived from someone else. [step] The most common mistake made in the quest for a happy marriage is to expect that someone should be " making " you happy. The old saying " to have friends requires one to be a friend " applies. <sep> (A) Regardless of whether your happiness is due in some sense to someone you love or something to do with your own, you should hear and be happy. [substeps] Two people don't get married just because there is someone else there to provide love and companionship. (B) Refrain from assuming that your friends and family love and care for you. In fact, expectations for your happiness are far from accurate. (C) If someone is what you expect them to be, try to be a " friend " with them. They will likely be incredibly happy when they express their true love, and please, observe them for a moment before delving in deeper. (D) [title] Focus on how you can make the marriage happy. [step] The only way you can be happy is by focusing on your own efforts to make your marriage partner happy.

A: D
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Q: [header] How to calculate a light year [title] Define the light year. [step] A light year is a measure of distance equal to how far light travels in one earth year. Because distances across the universe are so large, astronomers use light years. <sep> (A) However, they can also be determined by dividing by a distance. [substeps] Some light years are used year-round. (B) For light year 2014, the main determiner is the sun. In the light year, the world is filled with light bulbs. (C) Without light years, discussing the distance between two stars would require the use of large, unruly numbers. [substeps] Another measure of distance you may come across when learning astronomy is the parsec. (D) [substeps] There are two kinds of light years: day and night. The two types of light years are known as night and day.

A: C
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Q: [header] How to compliment your boyfriend [title] Compliment his face. [step] Your boyfriend's face is an important part of what makes him who he is. By complimenting his eyes, smile, or overall handsomeness, you can let him know how attractive you find him. <sep> (A) You can also compliment his ears and his mouth. [substeps] Note that most people have naturally attractive personalities (cute, brooding, self-centered, and just plain adorable). (B) You can compliment his mouth, nose, and chin as well. [substeps] Over time, his face will get less and less attractive each time you see him. (C) [substeps] Give a compliment like this: " wow, my eyes are the most beautiful, and they're always wonderful! " or " your shirt is so beautiful. " try to compliment a variety of areas of your boyfriend's face. (D) For the most effective compliment, try to focus on something unique about his appearance. [substeps] You could say, " i love the freckle next to your smile, " or " your eyes are the most incredible shade of green.

A:
D
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