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". 

Q: [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.

A: D
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Q: A large group of people are seen moving around on exercise bikes. the group <sep> (A) kicks around one another while others watch on the side. (B) move together while the camera pans around. (C) moves around the road and jumps on and off the exercise bikes. (D) rides around, bumping into one another.

A: B
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Q: [header] How to caulk walls [title] Clean the wall. [step] Caulk should never go on a dirty surface. Wipe down the wall with a dry cloth to remove dust. <sep> (A) Also use a brush to vacuum the surface. Don't use a brush on a dirty surface. (B) Then let the caulk dry and smooth out any uneven surfaces. Use a knife to cut a 2 inch (5.1 cm) square at the edge of the wall. (C) Next, caulk around the entire wall with a rag. A putty knife or a mop may work, too. (D) Wash with an all-purpose cleaner to remove grease and dirt. Rubbing alcohol and a wire brush will remove stubborn stains.

A:
D
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