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 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.
answer:
C

question:
This is a tutorial on how to start a campfire. It shows the campfire burning on the ground. it <sep> (A) shows the chimney of the home. (B) shows how you can put a few around to have some light. (C) starts with the things you will need to begin with. (D) shows how to hold the fire and set the pot the just a bit to catch propane.
answer:
C

question:
[header] How to throw a surprise birthday party [title] Determine if your honoree will react well to a surprise. [step] Not all people react well to something unexpected. So before planning a surprise party consider how your guest of honor will react. <sep> (A) Just like many college-aged people, it's important to gather some pros and cons to determine what a surprise birthday party is for your guest. [substeps] If your honoree has a hard time being surprised, have a surprise surprise party if the guest of honor reacts the best. (B) The more they react, the more pleased they will be. [substeps] Plan a surprise party on a weekend in the summer in august, or on the weekends in september or march. (C) Some may be more mentally and emotionally angry than others. Additionally, some may be curious or critical. (D) If you are unsure, talk to their close friends or family members to feel out the party idea before proceeding. Also consider whether they enjoy parties or like being the center of attention.
answer:
D