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:
Young boy talks to camera in front of drum set in a studio. young boy <sep> (A) plays on the drum set, and the cymbals, while intermittently speaking to the camera. (B) starts taking steps standing on a pedal holding a tool an trying to play an instrument. (C) drum set talk to camera and hold a dummy and cymbals. (D) starts unpacking drum set drum set as the camera captures his movements.

Ex Output:
A


Ex Input:
[header] How to change trackpad settings on macbook pro [title] Find the system preferences. [step] Starting from your main desktop screen there are two ways to find the system preferences where the mouse and touchpad settings will be located : [title] Bring your cursor to the bottom screen and find the system preferences application. [step] The icon looks like a box with three gears inside it. <sep> (A) Open that to find all your system preferences. [substeps] Alternatively, you can use the spotlight feature. (B) On macbook pro this icon resembles a round blue square with a horizontal green dot on it. On other applications this icon is actually a box with a gear, and is small in appearance. (C) It can be located on the taskbar or in the upper left-hand corner of the window. [title] Let the system preferences application perform its work. (D) [title] Click the customize key in the dialog box. [title] Follow the on-screen instructions to change the customization function.

Ex Output:
A


Ex Input:
[header] How to be a foreign resident (expat) in india [title] Take the right taxi when you arrive. [step] Look for the pre-paid taxi stand. Do not let any person approach you and offer you a taxi. <sep> (A) They are definitely overcharging by a very high amount (up to 300 percent! ). Make a difference between a/c (airconditioning) and non-a/c cab. (B) If you wish to appear ill in your presence, flag a taxi and tell the driver to stop. [title] Pay the fare when they have stopped. (C) Keep in mind that taxis can be friendly (and sometimes can even be friendly towards their driver just by being near them). Greet your taxi driver before you can get into the taxi. (D) Some people who use taxis in india do not like waiting, so this may feel confusing. Instead, keep space in between vehicles! [title] Receive your visa and your passport.

Ex Output:

A