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:
We see a man teaching others to sharpen a knife in a butcher shop. The man wets the sharpening stone. Two men in the back laugh at something. the instructor <sep> (A) shows us a basket of pennies. (B) checks the knives and uses the sharpened knife to sharpen a one. (C) uses a sharpening rod for the knife. (D) puts a paper in the sink.

Ex Output:
C


Ex Input:
[header] How to turn forty gracefully [title] Set a realistic weight goal. [step] A realistic weight goal should be based on the body and limits of your current self, not the self you wish you had or the self you had twenty years ago. Your goal should be specific and measurable, and limited in time. <sep> (A) [substeps] For example, if you are 35 years of age and have an empty stomach, then set a goal to lose ten pounds in thirty years from now on. Keep in mind that you will not see the difference in yourself if you start getting older. (B) If you are unable to accomplish a current weight goal, you should also consider setting another goal, often known as a baptism goal. Baptism goals provide an answer to both your doubting thoughts and worried questions. (C) [substeps] For instance, a goal to lose twenty pounds is a good goal. A goal that is vague like " i want to get fit " is not measurable. (D) [substeps] For example, if you are looking to reduce your overall physical limits, you might set realistic weight goals. For example, you might set out to lose 30 pounds in one year and then lose 20 pounds in another year, and then lose 25 pounds within that year.

Ex Output:
C


Ex Input:
[header] How to cope with dry mouth [title] Drink plenty of water. [step] Dehydration is one of the most common causes of dry mouth. Sipping water can also help to relieve dry mouth when it is caused by disease or as a side effect of medication. <sep> (A) [substeps] Drink about 64 ounces of water every day or two to three times daily. At minimum, drink two to three cups of fluids daily. (B) [substeps] Drink roughly eight glasses of water a day. For dogs, this should be eight to nine glasses daily. (C) You should aim to drink 64 ounces of water daily. You can adjust this by : [substeps] Limiting your intake of fluids or electrolytes, which help you swallow less. (D) [substeps] Doctors recommend drinking eight to twelve 8-ounce glasses of water each day to keep hydrated. Drinking too much water, however, can actually dissolve the mucus lining of the mouth and worsen the symptoms of dry mouth.

Ex Output:

D