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 clean a vornado fan [title] Clean out dust in the outer grills using a vacuum cleaner brush. [step] You can use a brush attachment on a vacuum cleaner to clean out all of the dust from the outer grills. Make sure the fan is unplugged before vacuuming. <sep> (A) [title] Place a cleaning rod in each section of the fan and squirt some cleaning fluid through each rod. [step] Avoid getting any grease in the vents or rest tray. (B) Some of the cleaner should be removed from the outside if you use a cloth and brush as cleaning instructions are laid out in the manual. [substeps] Avoid cleaning the outer grills with dust because it can detach some of the insulation and contribute to the fan's cooling. (C) Wipe down the inside of the cover every few minutes so you can put the fan back together. [substeps] For maximum efficiency, you should wash your vornado fan at least once a month, which is right after each dry run. (D) Go slowly when vacuuming to ensure you clean out as much dust as possible. [substeps] This will only clean the outer part of the fan, not the inside blades.

Answer: D

Question: [header] How to increase the bottom line for a coffee shop [title] Sell your customers high-priced drinks, such as espresso drinks. [step] Profits on espresso drinks can sometimes be 5 times higher than drip-coffee drinks. Offer your customers a free cappuccino or latte to get them to switch. <sep> (A) If you buy extra coffee, offer to pay the barista $4.57 for your drink. [title] Consider expanding your sales staff by purchasing low-cost coffee supplies, such as reusable coffee makers. (B) Aim for a total of about 30 percent in coffee sales and 70 percent in espresso sales. [title] Put espresso-based drinks at the top of the menu. (C) [title] Offer almond-sugar-free beverages, such as hot or low-speed made teas. [step] Some coffee shops offer this as a discount for their barista. (D) [title] Promote discounts, such as coffee-and-water deals or free items. [step] Some have given you discounts on beverages, items like coffee or a toy or accessory.

Answer: B

Question: [header] How to calculate diving scores [title] Write down the execution scores. [step] Each judge rates the dive from 0 (" completely failed ") to 10 (" excellent "), using half-point increments. This is based on how well the diver performs, from his starting position to entry into the water. <sep> (A) [substeps] When you hit " 50, " a judge can award you more points. Exclamation marks at the start of each dive count. (B) [substeps] Check each note at the beginning of the jump to see where the pokemon has jumped from. Near the end of the jump, it will be doubled in size. (C) [substeps] Once you have determined how well the diver performs, you can learn more about how to calculate your diving accuracy. Some judges say a diver is most accurate at two angles, while others say they are better in both positions. (D) The judges do not take difficulty into account for this score. [substeps] Example: a diver receives execution scores of 6.5 , 7.0 , 7.0 , 7.5 , 7.5 , 8.0, and 8.0.

Answer:
D