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 woman introduces that she will make a salad. She starts by taking a hand mixer and mixing several ingredients together to form a dressing. then <sep> (A) she adds hot chocolate syrup and water to the mixture. (B) , she adds the additional ingredients together with some cous cous and mixes everything together. (C) , she squeezes into a pot and put some chopped parsley and garlic in it. (D) she adds other ingredients, mixing the salad, followed by slicing the chocolate into slices.
[EX A]: B

[EX 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.
[EX A]: C

[EX Q]: [header] How to create a solar panel water heater [title] Get a double-glazed unit for the sunlight to pass through. [step] Glaziers and window manufacturers sometimes have scrap units for patio doors or large windows that can be bought very cheaply. Glass with a low-emissivity coating such as pilkington k glass is ideal. <sep> (A) [title] Get a single-panel room radiator that is slightly smaller than the glass unit. [step] Scrap yards sometimes have old radiators, or ask a plumber who is refurbishing a central heating system. (B) [title] Cut out two panels for the light fixtures in your home. [step] They should be at least 24 inches (61 cm) by 36 inches (61 cm). (C) [title] Decide what sizes you want your solar panels to be. [step] Some of them will be big enough that able-bodied people are able to fit into them. (D) [title] Find a plug-in faucet. [step] A tap with a hard rod is best, as power is concentrated in the chamber.
[EX A]:
A