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: A woman is shown leaning against a wall. Several ballerinas are shown in a room. different techniques <sep> (A) are demonstrated by them. (B) are shown for performance. (C) are shown for ballroom dancing. (D) are shown to teach the groups how to dance.

Answer: A


Question: [header] How to outfit a basic toolbox [title] Purchase a tape measure to include in your toolbox. [step] A tape measure comes in handy when you need to know the dimensions of a room before buying a new piece of furniture or centering a picture on the wall. [title] Include a box knife in your toolbox. <sep> (A) [step] A box knife, or utility knife, can be used to open packages, cut small pieces of wood or slice cardboard. [title] Put duct tape in your toolbox. (B) [step] It is critical that you list the dimensions which make up that box. If you don't, it will go in unusable pieces. (C) [step] A box knife (or a small, average sized box knife) can make a toolkit for a desktop store. For a playroom around a certain age, a box knife can provide yourself with more choice of tools and accessories and will make enough room for accessories that might otherwise be overlooked. (D) [step] This is to make sure all the box knives you buy have empty compartments and can be tried easily. [title] Purchase a pack of set base bonuses.

Answer: A


Question: [header] How to troubleshoot mold on interior walls [title] Examine areas with excessive moisture. [step] Check your home for sources of excessive moisture. These include flooding, water leaks, damp basements, hvac duct systems or shower or cooking steam. <sep> (A) Flooding may also occur from unexpected dampness level changes. If you notice anything different in one area, it is a good idea to address it immediately. (B) Look for uninsulated exterior windows and walls, including uninsulated closets along exterior walls where mold can grow when you run your heating in the winter. [substeps] Check the airflow in your home. (C) [substeps] In addition to dampness, mold can also cause problems like condensation, mold overheating, and light fixtures unable to function properly. Read your contractor's policy on decluttered areas, and follow any policies regarding ambient moisture. (D) Before attempting to fix this problem, you should take out a damp air meter. It will help to know how long the mold has been there, how long it took to develop, and if anything else is going on.

Answer:
B