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:
A black object appears and the woman is now placing it onto a long pole, she's back on the ladder and she's using the black object to help her hold up the border wall paper as she applies it all along the wall. when the woman <sep> (A) finishes the wall paper is covered by a blue curtain and she begins to pull the white rod back and forth as she continues to use the soldering iron to create the wall paper. (B) has drawn a border on the wall, she stretches up to get a better hold, three inches above the floor leaving the wall covered in white paper. (C) is done plastering, she takes the phone back and the actual wall paper is now in place and it seems to be the perfect size, exact size and it has sparkles, three big black holes in it and it has the laminate look to make it look very clean. (D) is done the camera pans to show the finished job and the outro appears that includes the website, company name, price and phone number.

Ex Output:
D

Ex Input:
[header] How to unlock tracfone mobile phones [title] Call tracfone. [step] Contact customer service at 1-800-867-7183 between 8:00am and 11:45pm, eastern time (et), 7 days a week. [substeps] If you did not buy your phone through tracfone, it is likely unlocked already, and no code is needed. <sep> (A) When you call, ask how long it should be on your phone or get a confirmation email for garfield. [title] Run an internet search for " tracfone mobile phones. (B) Look for a white box containing the code " 192.168.0.1. " if you do not see the code on the box, then replace it with the united states exit code (). (C) [title] Request an unlock code for your phone. [step] The representative will verify that your phone and account meet all the necessary conditions to be unlocked. (D) If you receive a voicemail notifying you that a call was unsuccessful, call customer service at 1-800-627-4590. [title] Place a text message (optional) on each call.

Ex Output:
C

Ex Input:
[header] How to make bunny tail truffles [title] Beat the cream cheese until it is fluffy. [step] Add an 8-ounce (225 g) package of cream cheese that's been softened to the bowl of a stand mixer. Insert the paddle attachment and beat the cream cheese on medium until it is light and fluffy, which should take approximately 30 seconds to 1 minute. <sep> (A) [substeps] You can soften the cream cheese by placing it in the microwave on a microwave-safe plate for 10 to 15 seconds. You can use a handheld electric mixer to mix the truffles if you prefer. (B) [title] Sift in the flour and stir through the truffles. [step] Add the flour to the cream cheese, and mix it in with the paddle attachment and the whisk attachment. (C) [substeps] The idea is to blend the cream cheese as it sits, and not alter the texture of the frosting while you're making it. [title] Scrape the flour and milk into a mixing bowl. (D) [substeps] You can also use the same method for cream cheese truffles but you can whip the cream cheese first so it's longer. [title] Beat 1 small egg yolk into the cream cheese.

Ex Output:
A