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". 

Example Input: [header] How to reduce unnecessary antibiotic use [title] Be more patient with your illness. [step] As a patient, it can be hard to have an illness that's causing uncomfortable symptoms and lots of distress; however, many respiratory and intestinal infections clear up within a few weeks and are not life threatening. As such, take the time to assess your symptoms before visiting the doctor. <sep> (A) This can help avoid unnecessary antibiotic use. [substeps] The rule of thumb is to allow symptoms like mild fever, congestion, running nose and/or cough to run their course, usually about seven to 10 days. (B) That way, and possibly minimize all complications. [title] Be proactive about completing your medical check-ups. (C) [substeps] For instance, your doctor may ask for certain vaccinations and vaccines. You may want to call your healthcare provider to confirm the vaccine has been given and how well the bacteria is working. (D) [substeps] Watch for signs of illness that reoccur after you stop taking prescribed medication. Conditions such as repeated inhalation of a foreign substance can result in chest pain.
Example Output: A

Example Input: [header] How to warm a horse's bit [title] Dunk in hot water, then wipe dry. [step] Heat water until it's just begun to steam, then bring it over to the stall in a bucket. Place a safety hook over the bucket and drape the bridle over it, making sure not to let the leather touch the water or the ground. <sep> (A) Dunk the bit for 10-15 seconds in hot water, or 1-2 minutes in lukewarm water. Wipe the bit down with a cloth to dry it. (B) Try to keep your head at least six inches from the water. The halter and bridle should be crimped, not tightened, to avoid fraying. (C) [substeps] You don't want the bridle to get hot. If this happens, you need to bring a band-aid or thick covering of newspaper over the cloth. (D) Smooth out any wrinkles so the bridle stays in place. [substeps] When you go to wash the bridle, look in the mirror to see if it fits.
Example Output: A

Example Input: [header] How to grow a flower wall [title] Decide where the flower wall will be. [step] Choose a place in your yard or garden where the latticework or trellis can be leaned against a wall and either has garden soil beneath it or space for containers. [title] Erect the latticework or trellis against the wall. <sep> (A) [step] Tie (using twine, wire, strong yarn, etc. ) and/or nail/staple in place, as appropriate for the surface it is leaning against. (B) [step] Do this even if it is not normally permissible for growing planters in your area. Planters will also need to be able to face a wall. (C) [step] At a minimum, the lattice or trellis should be level and set tall. [substeps] Remember that you'll need to design the lattice or trellis so that it overlaps the full length of your garden wall; and if necessary, add a stake to use as support to raise that line. (D) [step] Avoid making the lattice or trellis too close to a wall. Be careful and keep the soil level between the lattice and the wall.
Example Output:
A