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". 

[header] How to fist bump [title] Ball your hand up into a fist. [step] Press the tips of your fingers into your palm so that your hand makes a fist. This will be the position that you keep your hand in for the bump. <sep> (A) Hold the fist up high enough to extend your palm to one side. Bend your wrist so that both fingers are pointing out, with the whites of your knuckles showing. (B) [title] Put your fist out in front of you. [step] Place your fist in front of your body with your knuckles facing up. (C) Make sure your palm looks nice and flat. Ideally, this hand should be neither thicker nor thinner than your fist. (D) [substeps] Whether you're with friends or with an opponent, the fist looks like a punching bag in a gym. The knuckles, the tips, and thumb look like a regular ring finger.
B

[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.
B

[header] How to treat an eating disorder [title] Contact a mental health professional. [step] At the heart of eating disorders is often extreme pain, problems with self-worth, shame, and difficulty expressing emotions. The best person to tell is a counselor who should have the training and resources to help you get started in recovery. <sep> (A) [title] Seek medical attention immediately if : [step] Your symptoms worsen or get worse and you see severe signs of improvement. This should usually happen 30-35 days after treatment. (B) [substeps] Alternatively, you may want to visit the mental health professional's office for a consultation. They may have expertise with eating disorders and may ask several questions. (C) [substeps] All who treat a eating disorder should see a mental health professional. A good mental health professional can help you create a plan for recovery and support you through it. (D) Eating disorders are life-threatening and, while teachers, friends, and loved ones all care for you and are well-meaning, it is essential you speak to a professional who can get you help and that you can trust. [substeps] If you are in junior high or high school, talk to the school counselor.

D