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 add potassium to an organic garden [title] Mix in muriate of potash or sulfate of potash. [step] Muriate of potash, or potassium chloride, and sulfate of potash, or potassium sulfate, are natural minerals. Muriate of potash tends to be cheaper, but the chlorine it contains can hurt the helpful microbes living in your garden's soil. <sep> (A) Gently mix these two together first, then add the zinc sulfate. [substeps] Zinc sulfate is readily available online, or in desalination solutions. (B) [substeps] You can substitute sodium thiamine (ipsin) or baking soda for sulfate because it is the most acidic fertilizer. Sodium thiamine is a common fertilizer in agricultural and organic gardens. (C) Sulfate of potash is safer, but it's a bit more expensive. [substeps] Check your product's label for specific instructions on how much to add per square foot or meter. (D) [substeps] There are many ways to add potassium to soil: you could use the most common method. You could sift the potassium into an empty feed colander and cool it before dropping it off.

A: C
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Q: [header] How to do indian meditation [title] Sit on the floor or in a chair. [step] Find a place where you can sit comfortably for at least ten minutes. It could be indoors or outside. <sep> (A) You could even wear the same socks or wear the same footrest. Although there are many practicing yoga, it is not truly necessary to practice it. (B) Don't meditate in a bad home, as, your home will be home to a chronic and pushy person, and it will likely get tired again. [substeps] If you can, find a warm place that will allow you to sit comfortably for at least 30 minutes, preferably in a room that is not hot or stuffy. (C) [substeps] You could also hold a prayer or light candle. If you can't find a comfortable place in your home, try reading a magazine or doing a search for guided meditation websites. (D) What matters most, however, is that it is quiet and free from distracting noise like music, television, or people talking. [substeps] Not all noise is bad in the vipassana tradition.

A: D
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Q: Water is rushing between rocks in a river. rafters <sep> (A) are cheering as they dive into the water after a trout is caught. (B) are climbing the side of the rocks in the water. (C) stand on rocks on the edge of a cliff. (D) appear, paddling through the rushing currents.

A:
D
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