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 choose a protein supplement [title] Choose whey protein to build muscle. [step] If you're looking for muscle-building protein, whey protein is generally your best option. Whey protein can come in the form of powder or pills and is commonly used when people are trying to build muscle via things like weight training programs. <sep> (A) By doing this, you're gaining more body fat and growing more muscle at the same time. [substeps] Whey protein can be found in half of the packaged foods. (B) Whey protein is also a low-fat protein, rich in red blood cells from bacteria. Although whey protein does not impart healthy fats to the body, whey protein helps build muscle, which you can grow and burn through exercise. (C) [substeps] Look for a whey protein powder or supplement with a high biological value. This measures how well your body can absorb the protein. (D) Whey protein occurs as a food chain, hence the slogan, " protein is fat free ". [substeps] Whey protein is complex and varies from patient to patient.

A: C
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Q: [header] How to make donut holes with yeast [title] Prepare the dry ingredients. [step] Mix 4 cups flour , 1/4 cup sugar, and 1 tsp salt in a bowl. [title] Activate the yeast. <sep> (A) [step] The dough will rise and become fluffy once activated. [substeps] After mixing the wet ingredients with a fork, the dough will rise to roughly the normal texture. (B) [step] Pour 6 tbsp water into a different bowl and 1 1/4 tsp dry active yeast. Let it stand for about 5 minutes, or until the yeast starts bubbling. (C) [step] In a bowl, mix 1/2 teaspoon salt and 1/4 cup yeast. Stir these ingredients lightly in a bowl until you see white foam form. (D) [step] Add together 3 tbsp flour , 4 cups yeast, and 1 1/2 teaspoons table salt. Combine the dry ingredients first and stir in 3 tbsp water.

A: B
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Q: [header] How to wake up a cat [title] Recognize the sleep stage. [step] Normally, it's fine to wake a sleeping cat. However, there are two stages of sleep that are important to a cat's well-being: rapid eye movement (rem) sleep and non-rem (nrem) sleep, also called deep sleep. <sep> (A) [substeps] Rem sleep is generally all cats are given. However, jade cats may be given more than one sleep cycle. (B) If a cat is deprived of these sleep stages, he may become irritable or lethargic. If you think your cat is in rem sleep or deep sleep, you may want to let him be. (C) [substeps] When cats lie in deep sleep, the eyes go momentarily opaque. People use cat's eye drops (gha) for this reason. (D) [substeps] The rem stage is when the cat is deeply asleep, without moving. The rem stage of sleep is especially time-consuming because the tarantula is the only animal with rem.

A:
B
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