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: A man named prvni kroky is on metal stilts outside and he begins, walking, jumping, running and moving and doing various movements while on his stilts and people around him are either sitting or walking doing their own thing. when the man <sep> (A) is done, the table is properly set. (B) stops jumping it has a black cage with a little trolley on the front, and he begins playing across the back with both items first removing the bars, turning the handle and then tightening the chain. (C) is done exercising and performing various moves and extensions for doing the extensions he begins to speak to the camera and such and a keyboard is shown up close. (D) is done demonstrating what he can do on the stilts he stops in his original spot to talk some more, waves and then runs off.

A: D
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Q: A pitcher pitches a ball to the batter. the batter <sep> (A) bats the ball really far. (B) is deflected by the bat. (C) misses, throwing the ball into the field. (D) takes the envelope down and lays it down.

A: A
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Q: [header] How to make a fireplace more energy efficient [title] Install a top-sealing chimney damper. [step] Top-sealing dampers replace the fireplace throat damper and are installed at the top of the chimney. The top-sealing damper has a seal that acts like a storm door, keeping the expensive conditioned air inside the house and the outside air-outside. <sep> (A) [substeps] Check the quality of the damper accurately to ensure its old-fashioned texture. Chimney damper versions range from cheap to premade fireplace damper. (B) [substeps] Most water-based fireplaces end with a top-sealing damper damper. This damper exists because the chimney chimney damper is dry enough to withstand collecting ashes and the chimney damper cannot insulate the poisonous air inside. (C) If you have trouble shooting fire, you could use your fireplace damper to replace the chimney damper's damper. [substeps] A top-sealing damper damper can be found at most home improvement stores. (D) This principle works year-round, whether you're heating or cooling your house. This product can be purchased online and is easily installed by either a homeowner or a handyman.

A:
D
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