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 install a bakflip hd tonneau cover on a ford f150 [title] Place the rail of the bakflip hd on right hand side bed rail of the f150. [step] Slide the tonneau rail all the way forward to the bulk head. It is a good idea to have a squeeze clamp or similar to hold it in place. <sep> (A) [title] Slowly turn the bakflip over so it moves slowly, its going to wobble and have to be bent the opposite way of the rail. [step] Be prepared for a lot of bumping. (B) [title] Tightly wrap round tray socket on right hand rail over cover and fasten. [step] Compression disks complete a swivel mounted over rail. (C) [title] Place the included rail clamps in place. [step] Tighten with a wrench or socket. (D) This will prevent the oil from jumping up and down accidentally while the g2 is being painted. [title] Place the nikon bolt assembly inside the couplers cradle.

Ex Output:
C


Ex Input:
[header] How to use the illusion effect in gimp [title] Find a suitable image and open the picture in gimp. [step] For special effects like this, i like to select images that don't stand alone as a good pictures. This picture is not the greatest. <sep> (A) To create the illusion effect that you like, click the picture on your timeline and click on the picture from where you saved it to open it again and insert the illusion effect dialog box into the image. [title] Click on selection] effect] frame] naked. (B) Study the image's background so that it can stand out more than its poor. [substeps] Don't worry about professional preferences; if you enjoy the way the images look, look at the options in the image to select the image you'd rather work with. (C) Basically, it needs to be hung outside a hanger to be visible from potential passersby. Try to get jazzed up! [title] Use a few rows of colors to make your image : [substeps] Select a couple colours, covering them with an image. (D) The lighting is flat and the background is kind of distracting; however, the eyes and facial expression have some impact, so the image may be improved with a special effect. [title] After opening the image, click on filters and mapping to find and select the illusion map.

Ex Output:

D