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
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Q: A girl is riding on a yellow riding lawn mower on a very large yard filled with green grass. when the girl <sep> (A) makes it to the end of the lawn, she stops, takes a deep breath, gets off her horse and walks away. (B) stops, she is standing in front of an able to reach yellow dirt path to prepare her destination. (C) reaches the end of the yard she makes a turn and drives up in the same direction she just came from. (D) reach the end of the yard, she looked around and started to turn around and walk back to the beginning.

A: C
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Q: [header] How to inflate a basketball [title] Get an air pump. [step] Purchase a decent air pump for balls if you have not done so already. Pumps aren't too expensive and are easy to find. <sep> (A) Tennis balls are a great alternative because they're light, sturdy and easy to transport. Try not to get them hot! Choose one with the correct fit : [substeps] Air pumps are recommended because sports ball stores carry them. (B) You can even use a bike pump with the proper needle. [substeps] You'll need to purchase a ball needle if your pump doesn't already have one. (C) Ensure you have enough room in your box to fit balls. [title] Spray air or draw oils in a bucket. (D) Any size will do, and they come in many different forms: balloon-shaped or with holes in the bottom. ( adding size in between each hole makes the ball push out.

A:
B
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