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 polish rocks [title] Choose the right rock. [step] You can polish any stone you wish, but there are certain characteristics of a stone that will make it easier to polish. If you want an easy stone to polish, pick a somewhat softer stone like onyx, limestone or calcite. <sep> (A) [substeps] You can polish diamond, granite or ceramic stones by cutting thin pipe holes or inserting dry mortar into one side of each hole. Look for a stone that resembles a diamond, but not necessarily a diamond. (B) Otherwise, a smoother, more pumice-like stone will be more difficult to polish. [substeps] Emeralds and equilateral manganese are both excellent mineral polishes. (C) Stones that are very hard will take a much longer time to polish. However, though hard rocks take a long time to sand, they yield more shine than softer rocks. (D) Softer rocks will actually work more well, and might look better to polish very old stones, but brighter stones tend to chip quicker. [substeps] Rubies, sapphires, and emerald are good options.

A: C
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Q: There's a woman sitting on a cozy chair with her two cats next to her, knitting a black yarn hat. the black cat <sep> (A) wakes up from its sleep, goes over and rubs on the woman several times and one person in the back grabs his cat, drinks some water and finally goes back to sleep. (B) is now sitting on a silver plate, one paw quickly getting knitzed. (C) gives a series of pats on the brown and blue body, while the black cat tries to stand up. (D) is sitting right next to her and playing with the yarn while the brown cat is watching them.

A: D
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Q: [header] How to inspire creativity in your kids [title] Be a role model. [step] Be open-minded in your thinking and find lots of solutions to many problems. Show your kids that you are flexible and willing to try new things. <sep> (A) When faced with difficulty, show your kids that you can approach the problem in different ways and still be okay. [substeps] If your kids ask you a question, be creative in how you answer it. (B) [substeps] Consider starting your own art class for your kids. This improves their understanding of what art means. (C) Tell them there are plenty of excellent ways to reinforce what's already in front of them. Young kids can ask many questions of themselves, and you can provide the biggest answer. (D) They'll be more likely to succeed if they feel they can see this side of yourself. Be flexible in your thoughts, thinking on your toes, and feeling comfortable in your own surroundings.

A:
A
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