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 bend rebar [title] Understand the structural issues possible with manually-bent rebar and know how to avoid them. [step] When you bend metal, you naturally weaken it. When done correctly, however, you can minimize damage and still get the shape you need to complete the project. <sep> (A) [substeps] Badly bent rebar acts as a buffer for the metal particles of the laser beam. The piece of rebar you are bending dissolves when squeezed into contact. (B) This effect is part of the re-bend method. The process is a little different than rebending a rubber band, but the difference is that you bend it in half by simply opening up a v on each end. (C) Because of this, it's important for you to know how to modify the shape you want the rebar to be. If you have a badly bent rebar, you'll likely create grooves in the rebar that introduce excess material. (D) Keep the following in mind as you work : [substeps] Always note the grade and size of the bar you're bending, checking against the equipment you're using to ensure it works. Check with your project engineer to ensure your bends meet the minimal internal bend diameter.

Answer: D

Question: [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.

Answer: C

Question: [header] How to deep fry bacon [title] Fill a fryer or deep pan with oil. [step] Start by turning on your deep fryer, or finding a pan that's spacious enough to completely submerge the bacon in. Fill the pan or fryer with about 2 cups of vegetable or canola oil. <sep> (A) [substeps] Don't use butter, margarine, sodium hydroxide, or other oils from the grocery store. You should still use oil from the microwave, skillet, or any heat source, as these will feel very hot. (B) The bottom of the cooking surface should be covered with a couple inches of oil. [substeps] A deep fryer with a built-in basket will make this type of culinary project much easier, but it is not a requirement. (C) Make sure the oil you use is light and else it will be difficult to fry the bacon. [substeps] For a deep fryer, use a conventional fryer or an inch fryer. (D) [substeps] Make sure that there is at least 6 inches (15 cm) of space in between the bottom of the fryer and the inner of the fryer tray. Do not use skim or pre-moist oil, which will give you better results.

Answer:
B