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 install custom firmware [title] Record the router's model and version number. [step] These numbers are usually located near the manufacturer's logo, underneath or in back of the router. Write down the model and version information for future use. <sep> (A) [substeps] If you are using windows xp (default operating system), the model number can be found in the start menu under " system settings. " skip all the discussion menus, and then go to system preferences. (B) [title] Obtain the router's ip address and default gateway for your computer system. [substeps] Determine the ip address and default gateway for a pc. (C) [substeps] " w " with the green background is the serial number for the model. " p " with the red background means " unhappy operating system. (D) [substeps] It is easy to determine what operating system is running on your router if you don't know the model. Copy the model from the registry to convert it to your operating system.

Ex Output:
B


Ex Input:
[header] How to transfer money between bank accounts [title] Ask a teller to transfer. [step] The easiest way to transfer might be to stop into the bank and ask a teller to move some money around. Have your account information available and state how much you want moved and where. <sep> (A) A teller may be open to letting you move funds anywhere you prefer and how much you want to transfer. This will allow you to transfer money from another account directly into the bank. (B) You might need to fill out some slips at the counter. The teller should be able to help you. (C) Ask the teller if there is a " no processing fee " fee for this service. [substeps] This fee can range from $25 to $75. (D) [substeps] By moving your money, you are allowing your bank to know the funds being transferred. For example, in the us, the bank receives funds one month after a certain date as part of a maintenance check.

Ex Output:
B


Ex Input:
[header] How to make quick meringue cookies [title] Prepare the oven and baking sheet. [step] Preheat the oven to 300 degrees. Take out a baking sheet or cookie tray, and line it with parchment paper. <sep> (A) One of the easiest ways to bake the meringues is with a 9 x 9 " baking sheet. [substeps] Place the seasoned meringues on the baking sheet so they are not touching. (B) This prevents the meringues from sticking. [title] Whip the 3 large egg whites and a pinch of salt. (C) If you prefer, you can grease the sheet with nonstick cooking spray instead of parchment paper. [title] Separate the meringues from the parchment paper into the bowl and add the powdered sugar and the rest of the ingredients in the bowl. (D) [title] Prepare a deep fryer and the electric griddle. [step] Set the temperature to 450 degrees fahrenheit (176.5 degrees celsius).

Ex Output:

B