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:
[header] How to paint watermelon nails [title] Remove any old nail polish. [step] Soak a cotton ball or pad with nail polish remover. Rub the soaked cotton ball over the old nail polish gently to remove the polish. <sep> (A) [substeps] Rinse away the polish from the peel and gently scrub away the residue, to avoid further staining the polish. You do not have to cover the peel in nail polish remover. (B) Don't wipe the wet cotton onto the watermelon, but rather gently rub it over the nail until the paint is lost. [substeps] Washing the cotton ball between uses will get rid of any old paint. (C) You can also wear gloves to avoid damaging your fingers. [substeps] The rubbing motion will help the polish to adhere to the nails. (D) [title] Paint your entire nail a light pink or red, the color of watermelons. [step] After applying a clear base coat apply a thin coat of pink or red polish starting at the base of the nail and working your way up.

Ex Output:
D


Ex Input:
[header] How to prevent greasy hair [title] Shampoo properly. [step] Apply a small, quarter-sized amount of shampoo to your scalp and massage vigorously with your fingertips. Then, work the lather through your hair and rinse. <sep> (A) [title] Rub a dime-sized amount of baby oil in your palm. [step] Squirt a dime-sized amount of all-purpose baby oil into your palm and then use the back of a spoon to massage the lather into your hair. (B) Body wash will also work well to loosen the oil from your hair and prevent it from slacking off. Comb your fingers through your hair to ensure that all areas of your hair are clean. (C) [substeps] Whether you have wet or dry hair, lather the lather gently and never hold it in place for more than one second. [title] Consider bed-wetting your hair as often as you can. (D) Rinse hair thoroughly so no shampoo is left behind. Washing your hair should take about five minutes.

Ex Output:
D


Ex Input:
[header] How to spend a night alone in your house [title] Finish your homework. [step] If your want to make the best use of your time, sit down with your textbooks, jotters and notes and give them your undivided attention. This is a good opportunity to work on any assignments you haven't completed, since you'll be able to study uninterrupted. <sep> (A) There's no wrong way to study. However, if you find yourself finding your mind wandering, scan your syllabus or notes and examine them through your glasses, reading aloud to the book. (B) [substeps] Should you find yourself stuck, circle the problem and ask your parents or teacher about it the next time you have a chance. Be responsible and get your homework done before you begin enjoying other activities. (C) [substeps] There is no reason to wait two or three hours after you finish your homework to study. Actually, schedule an all-day study session where you can rest and focus. (D) [substeps] Don't give up if you're told to give up. That's a simple behavior that you should never be told to do.

Ex Output:

B