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 cast iron stove [title] Place an old newspaper on the ground in front of the stove. [step] Do this as a protective measure before you begin scooping ashes out of the stove, as they are liable to drop onto the ground. A newspaper will make cleanup much easier. <sep> (A) [substeps] You might even want to splash some cold water over the newspaper, so the water completely freezes around the newspaper. A drop of lemon juice can also help. (B) [title] Pour about a tablespoon of salt into the newspaper you have saved. [step] Add lemon juice and shake off the salt. (C) [title] Use the newspaper to wipe and scrape any soot out of the cast iron burner. [step] Do this several times until any soot is gone. (D) As you're spreading the newspaper, open the air dampener so that any ash stuck to it will fall into the firebox. [substeps] The air dampener will be a small knob on the front of the cast iron stove, that you should pull outward to open.

Answer: D


Question: [header] How to buy a light kit for photography [title] Make a list of required and/or desired criteria for your light kit. [step] These features include whether you want lights arranged on the floor or ceiling, what kind of photography you will be doing, how many lights you will need, etc. [substeps] Floor studio lights and backgrounds can be transported and arranged on stands or supports. <sep> (A) You may want several different lighting items in one kit. There are many available but most of the light hardware items, like dimmer switches and binders or small set of battery-powered lights, should be picked up at a craft store. (B) Pointed, straight, or one-sided lights can be divided into categories and arranged on tables or on poles. [title] Purchase fixtures that fit the gender and the type of lighting and coloring range that you want to consider. (C) Ceiling lights are more expensive and must be on a rail system for positioning in a rectangular area while background rollers are mounted on the ceiling. Your type of photography can determine how much light you need. (D) Frame sizes can be adjusted to your personal preference depending on the size of your studio. Don't forget to read the product description as well.

Answer: C


Question: [header] How to keep your posture straight when you carry a heavy backpack [title] Wear the backpack as it was designed to be worn. [step] Namely, wear it on your back, with all parts doing what they're supposed to do. [title] Wear both straps. <sep> (A) [step] Check the side straps after every class so that you know what all the straps do. If they don't matter, just wear your backpack as it was designed to be worn. (B) [step] You should not just up-and-down wear it now and then. This may cause discomfort in the shoulder area or on the strap itself. (C) [step] Place a strap over each arm so that the straps sit evenly across each shoulder. Wearing the bag on only one shoulder causes strain and will make your posture lopsided. (D) [step] Wear your backpack with both straps for added comfort. When you're carrying a heavy backpack, you'll be taking your backpack off now and back on.

Answer:
C