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". 

[EX Q]: A white screen appears with colorful special effects that include a child's face a flying blue butterfly and colorful words that read "healthy child healthy world healthychild", another white screen appears with the words "healthy child tv healthy bytes". a woman <sep> (A) then appears wearing a front yard apron and proceeds to dodge a fly that flies after her. (B) is standing in a kitchen, and she begins to rub ingredients into cake pans, which she dumps onto the pan. (C) is now standing in a kitchen, words on the screen say her name is jennifer taggart and she's an eductional program specialist, and she's talking the whole time while demonstrating on how to measure ingredients and then she pours them into a clear glass bottle through a funnel. (D) is then shown painting nails and jacket or clothing on a blue paper piece styled with colors that begins with red and blue.
[EX A]: C

[EX 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.
[EX A]: A

[EX Q]: Several people lay in tubes in the snow. More people are standing around them. Eventually some of them go down the hill. they <sep> (A) are shown in several clips performing acrobatic tricks. (B) stand where they started, waiting to go down. (C) begin to get up and walk away. (D) reach the bottom of the hill.
[EX A]:
D