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 do chest exercises in yoga [title] Do the mountain pose to warm up, plus a couple of humming bee breathing exercises. [step] These will get you ready to stretch out your body in the variety of poses you'll use to exercise your chest. Notice your breathing pattern as complete the mountain pose. <sep> (A) Inhale and keep your breathing slow and even throughout the whole warm up period. [substeps] Alternatively, do a crossfit pose to warm up. (B) [substeps] You might try taking an extended pause to " use " your rib cage, start to breath in, breathe out, and repeat. You can also try practicing your opening pose from a hovering yoga chair, at home, or in a pose at your workplace. (C) Settle on a consistent, slow pattern of breath as you start the workout. This breathing pattern will help calm yourself and prepare your heart rate for the more difficult exercises to come. (D) [substeps] After doing the mountain pose, you can do finger circles or kangaroo standing pose to warm up the muscles in your chest. [title] Do the rock dii to strengthen the core.
C

[header] How to train chickens to return to their coop [title] Prepare your chicken coop. [step] Before you can train your chickens to return to the coop in the evening, you need to ensure the coop is set up properly for your chickens. A basic chicken coop should provide at least twenty-four square feet of space and multiple places for chickens to perch. <sep> (A) To ensure proper lighting, you will need to buy a coop lamp or turn off the overhead light. You will also need to provide adequate heat. (B) Your chickens will probably also need a hutch, cart, or larder to keep them warm. All three features are important as you start building your chicken coop. (C) [substeps] Coop space should be compatible with how large or small your chickens may be. Don't space your chickens too close to each other. (D) [substeps] Make sure there is a plentiful supply of food and water inside the chicken coop. Wood beams mounted horizontally can provide good perching space for chickens.
D

[header] How to pack a first aid kit for a hike [title] Pack all prescription medications. [step] Any medications that you require on a regular basis should go with you on your hike. These items will not be available in the wilderness, or usually even in a general store, so it is better to be safe than sorry. <sep> (A) This even applies if you anticipate being back from your hike in time. [substeps] Prescription pill packaging can often be bulky. (B) [substeps] If you plan to use any medications, be sure to stock up well ahead of time. Packing antidepressants is extremely important. (C) Choose common medications in this area and always follow the manufacturer's instructions, including the following : [substeps] Denatured alcohol (. 40 g for most people) aspirin or ibuprofen lozenge [title] Bring for part of the trip. (D) [substeps] Regardless of where you choose to drink or eat, take all prescription medications in the same order they are normally put in your kit. [title] Pack weighted-duty lighter fluid bottles.
A