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 read a screw thread callout [title] Read the numbers. [step] They will look something like one of these : [substeps] 4-40 x. 5 1/4-20 x 5/8 m3-0.50 x 10 [title] Interpret the first number. [step] The first number gives the major, or largest, diameter. <sep> (A) Next, determine the size of the screw thread you wish to use. Write these numbers down on several pieces of paper and trace around them. (B) It also tells you the larger diameter of a screw thread to create a series of polygons which share a small degree of overlap by a single number. [title] Separate the single digits in each string from each string. (C) [substeps] In unified threads (measured in inches) there are numbered diameters 0 through 10, with 0 the smallest and 10 the largest. ( diameters 12 and 14 may also be found, but are usually on older equipment and needed for repairs or restorations. (D) However, an " x " will bring more light up on an empty needle, so use a tray or ice scraper to fill it to feel the thickness of the screw. The next number tells us that the machine is a small amount bigger or larger than what we used it for.

Ex Output:
C

Ex Input:
[header] How to attract deer [title] Check local laws before establishing a feeding area. [step] In many states, feeding deer at certain times of the year is illegal and is discouraged. Deer that are fed may become nuisances to people. <sep> (A) [substeps] Check the local laws in your state before you start setting up a feeding area. You can look up laws in your area by visiting the state's hunting and/or grassland authorities website. (B) [title] Make sure that you locate your food plot away from roadways. [step] Deer might not come close if there is a lot of traffic nearby, and luring deer into the path of traffic can have serious consequences. (C) This could cause problems with highway safety, private park privacy, or other amenities you have at your local livestock shelter. If necessary, research the regulations in your area before making any kind of split-second decision. (D) Upon obtaining permission, you may get permission to feed a deer in your community. [substeps] The designated feeding time for deer is 8:00 am , 2:00 pm, or 10:00 pm.

Ex Output:
B

Ex Input:
[header] How to reflash bios [title] Download the bios update executable from the manufacturer website. [step] Read any instructions that come with the executable. Most executables will run fine whether they are loaded onto a floppy or a cd. <sep> (A) [substeps] You can download updates using your usb ports, using the icloud launcher, or by downloading the latest version of the app from the apple store. [title] Download the full version of the bios file you downloaded. (B) The instructions will let you know if a floppy isn't the recommended method. [substeps] If you don't know the manufacturer of your motherboard, you can use the online bios id manufacturer database to determine the exact make/model. (C) Make sure you follow all steps detailed in this article. [title] Access your bios update in full and play it. (D) If you don't have a cd in your system, purchase one from your internet retailer. Your download doesn't need to be a text file.

Ex Output:
B