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 pass the 11th and 12th grade in nepal [title] Start the plan. [step] In nepal, after completing the 10th grade (slc level) you're allowed to join the 11th and 12th grade. So all you have to do is pass the slc examination by the end of grade 10. <sep> (A) It'll be much helpful to you if you pass the examination with a distinction (80% or above). The slc exam is pretty easy if you know the basics of grade 10. (B) If you don't pass the slc exam, you become a naturalized citizen. This means that you must obtain two separate grades to take the 10th and 12th grade. (C) This is a requirement if you want to go to the best school in nepal. [title] Make sure to celebrate the 10th grade. (D) This is to show that you actually know what to study. It is less likely that you will not successfully pass the class and you could also get suspended by the other students.

Ex Output:
A

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:
Several shots are shown of children hitting the balls as well as speaking to the camera. more kids and adults <sep> (A) speak to the camera while showing how they hit the ball. (B) run up and down the court and speak to the camera. (C) watch as all of them bounce balls around and then stand around with goalie clothes on in speak to the camera and pretend to shoot balls. (D) are seen playing with one another followed by a large policed smoker walking in.

Ex Output:
A