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". 

Example Input: [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.
Example Output: A

Example Input: [header] How to stop making excuses for toxic parents [title] Take a step back from your parents. [step] Get some space so you can gain perspective on your parent's behavior and your relationship with them. If you're around toxic or abusive behavior all the time, you may get used to it. <sep> (A) Give yourself a few minutes to breathe before jumping into a more draining conversation. [substeps] Take a moment to sort the information into fresh, concrete terms. (B) [substeps] Asking people to keep your distance can help you to find a second perspective. If you don't know what to say, ask questions. (C) Taking a break can help you get a clearer-eyed look at what's wrong. [substeps] If you still live with your parents, creating some distance can be tough. (D) Try to put yourself in their shoes, and see how you can make a change in yourself. [substeps] Just as many parents try their hand at parenting, they don't always resolve conflicts tactfully and maturely.
Example Output: C

Example Input: [header] How to adjust [title] Allow yourself to feel upset. [step] You won't be doing yourself any favors by trying to avoid the feelings moving is going to bring up. You're probably excited, anxious, stressed out, sad to leave your old life behind. <sep> (A) These emotions could freeze up when you see this new person, remind you that you still loved him/her, or make you feel insecure. [substeps] Avoid beating yourself up for feeling these emotions. (B) This will fester and progress further into sadness, despair, frustration and other emotions you will have difficulty addressing. Take some time to detach from these feelings by doing something rather than dwelling on them. (C) All of these are natural and okay! [substeps] Take a time-out when everything gets to be too much. This can be something as simple as 15 minutes in a quiet room in a coffee shop, or sitting on a park bench. (D) All these circumstances make it hard to find joy or happiness. [substeps] Pushing past them will only relead you to stay in your old life, resulting in feelings of depression, dependency, and fear.
Example Output:
C