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 help stop police brutality [title] Share news stories about police brutality. [step] When you see good-quality articles about police brutality, especially those connected to recent events, share them on social media sites like facebook and twitter. This will help keep the topic fresh in the minds of your friends and followers. <sep> (A) You can even make a news page dedicated to your precinct or neighborhood, and give people posted online about police brutality relevant to your neighborhood. Cover these fan-fiction very well by understanding the facts that are relevant to your area. (B) [substeps] It can also be a great way to reach out to other people about police brutality. Many people will be sympathetic, even if they don't fully understand the danger or the costs for criminal action, and it can help cut down on potentially startling images of violence and embarrassment. (C) The good articles, and the news you've already shared, are also more likely to be read, because you'll be a link between the good and the bad. [substeps] Posting good news is key to providing easy access to world wide web news databases. (D) [substeps] Before posting an article, double-check the publisher and writer to make sure it isn't a form of fake news. Make sure you post about non-political things as well, that way people don't tune you out.

Answer: D


Question: [header] How to measure light intensity [title] Understand photometers that measure lux and foot-candles. [step] These are units that describe the intensity of light on a surface, or. Photometers that measure this are usually what people are looking for when they want to set up a photo shoot, or test whether a room is too bright or too dim. <sep> (A) [title] Familiarize yourself with photometers over other techniques. [step] Photometers can be very versatile. (B) [substeps] Some light meters are specialized for different types of lighting. For instance, one may produce more accurate results when used to measure sodium lighting. (C) [title] Use an online article on how to determine lux and foot-candles. [step] Find an online article about how to calculate lux during a flash. (D) [substeps] Measure lux by adding one pound of light at a time to the scale of a standard candle. For example, for a 4.5 lb candle, a quarter pound weight of light would make a half pound candle.

Answer:
B