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 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 safely dispose of paint [title] Consider saving it for a later project. [step] Latex paint can be stored for up to a year and then mixed and reused for a later project. It won't be the exact color you need, but it's useful to use as a base paint or to paint interior surfaces that won't be seen. <sep> (A) This way, you can use up all the paint without needing to throw it away. [substeps] Tightly seal the used paint can and store it upside-down in a cool, dry storage area. (B) Paint by hand is cheaper and more efficient. [substeps] Latex can go bad very quickly. (C) Latex paint is safe to use on countertops and other paint surfaces. [substeps] Latex paint cannot be mixed and reused for a future project that will use latex paint, such as wallpaper, furniture or wood. (D) [substeps] Put away your painting supplies and other storage materials if you intend to use the latex as a new color. [title] Protect your walls from dust and mildew.

Ex Output:

A