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 study the phenomenon of light as a nonequilbirum state of matter [title] Understand how thermodynamic systems are categorized. [step] Thermodynamic systems in nature are divided into two types. One is systems that are at equilibrium state with the environment and the other is systems that are in a state of nonequilibrium with the surroundings. <sep> (A) On earth, nature has a preference for systems that are at an equilibrium state with the surrounding. This is so due to the principle of minimum energy that every object in the universe aspires to have. (B) For example, gas rising in temperature throughout the day can be divided into microorganisms in the environment. [substeps] For example, gas rising in temperature in the atmosphere can be divided into molecules in the environment. (C) [substeps] Equilibrium is fundamental in thermodynamics. Other systems include stars, planets, and oceans. (D) [title] Learn about the term " rock hydrodynamics ". [step] Rock hydrodynamics refers to the transfer of water to the earth's surface.
[A]: A


[Q]: [header] How to heat sake [title] Know when to heat sake. [step] Nowadays, premium sake is usually served chilled instead of warm. If you have a less expensive type of sake or simply want to draw out a different dimension of flavor, though, you can try heating it before serving it. <sep> (A) This can be an especially good option for a cold winter day. [substeps] Heat causes the alcohol to vaporize. (B) Always check reviews and cookbooks on quality sake. Always check the character of sake before serving it. (C) That will give you the best desired flavor and no pain or damage to your sake at all. This way, you won't have to adjust the temperature. (D) To work this way, reduce the size of the container or pot of sake. [title] Allow the sake to heat until you notice condensation building up on the outside.
[A]: A


[Q]: A crowd is gathered around a black tiled area. a man in black <sep> (A) pants in front of the crowd runs a rope around a man's neck. (B) raws is talking to the camera. (C) shirt is on the middle of the circle. (D) does some breakdance moves.
[A]:
D