instruction:
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". 
question:
[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.
answer:
C


question:
[header] How to make dead sea bath salts [title] Buy at least 1 lb. [step] ( 454 g) of dead sea salts. You can find these particular salts through online retailers and at some natural food or body care stores. <sep> (A) Call ahead to ensure they have what you are looking for. [title] Choose some essential oils to add to your bath salt mixture. (B) Typically, these salts will range from 120 to 140 grams per day. Lb: fresh sea salts are thinner than organic sea salts, making them more concentrated when mixed into bath or warm water. (C) [substeps] The lb is dried seaweed from a growing plant. Your sea salt comes from a plant, either live or dead. (D) [substeps] Lb salts are naturally salt-based, meaning they use a variety of ingredients. They are often sold in packs of 10 or 15.
answer:
A


question:
[header] How to act like starfire from teen titans [title] Be very outgoing and friendly. [step] Starfire is bubbly, sweet, and always willing to befriend new people. Since she came to earth and adopted it as her new home, she has been trying to learn what she can about the planet and the people on it. <sep> (A) [substeps] She is notorious for just being bubbly, but a lot of that is fake. Additionally, starfire is known for her charm, her attitude, and her humor. (B) Shy, outgoing, and unmotivated are all her characteristics. You shouldn't be judging her because she's a screw-up or because of her past! [substeps] Silence a bad monologue when you see her. (C) To act like her, be friendly and outgoing, and introduce yourself to lots of new people. [substeps] If there is anyone in your school classes you don't know, for example, introduce yourself. (D) Talk to people and find out as much as you can about them. If you have questions, write them down and learn what you can about them, including if you can exchange contact information.
answer:

C