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 Input:
[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.

Ex Output:
C


Ex Input:
[header] How to use metallics in your wedding decorations [title] Decide how bold a statement you want to make with metallics. [step] In most cases, metallics work best as small accents in your wedding decor. However, you can use larger splashes of metallics to make a bolder statement. <sep> (A) Choose a bolder statement color for your decorations. [substeps] Red, orange, purple, black, and plum are the most common metallic colors used in any wedding decor. (B) [substeps] For example, you might want to create a statement like a star, necklace, and flower in your wedding color scheme. You may want to try a solid color such as brown or ivory. (C) Keep in mind that your decor will have a more dramatic look, though, so a heavy dose of metallics is more suited for a formal or evening wedding. [substeps] If you want to go heavy with metallics in your decorations, it's best to pair them with a neutral color palette. (D) Go for more of a statement by drawing out bold combinations of colors that a person could use with metallics. [substeps] Bright, bold, and flashy colors like neon and bubblegum yellow are great accents.

Ex Output:
C


Ex Input:
[header] How to make taco salad [title] Mix the salsa and sour cream together in a small bowl using a fork or mini whisk, then set it aside. [step] Keep mixing until the color is uniform and there are no unmixed streaks. Set the dressing aside, preferably in the fridge, so that it's nice and cold. <sep> (A) [substeps] Make sure that you are using the smooth kind of salsa and not the chunky kind; do not use pico de gallo. [title] Cook the ground sirloin over medium-high heat. (B) [substeps] If you can't stand it, skip this step and prepare your dressing for enchiladas, mac' n' cheese, or any other dish. [title] Mix the cheese and corn starch into the dressing. (C) [title] Place the taco dip halves to side, since they will be facing up again. [step] Then, place the brisket, olives, tahini and onion wedges halves to the same bowl with the salsa mix. (D) [title] Heat oil in a skillet over medium heat, then cook the diced guacamole on high for 6 minutes. [step] The stickiness of the guacamole helps the flavors stay attached, so don't let it get too sticky.

Ex Output:

A