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 small group of girls are first seen walking out on a gymnasium floor with several people watching on the sidelines. the girls <sep> (A) come together on a patch and begin performing dance moves with one another. (B) begin dancing and flipping with one another slowly back and fourth. (C) then perform a routine using batons while spinning and twirling. (D) then begin performing a routine on a step stool and ends with them getting back in the circle of walkers and dancing on the spot.

Ex Output:
C

Ex Input:
[header] How to calculate a light year [title] Define the light year. [step] A light year is a measure of distance equal to how far light travels in one earth year. Because distances across the universe are so large, astronomers use light years. <sep> (A) However, they can also be determined by dividing by a distance. [substeps] Some light years are used year-round. (B) For light year 2014, the main determiner is the sun. In the light year, the world is filled with light bulbs. (C) Without light years, discussing the distance between two stars would require the use of large, unruly numbers. [substeps] Another measure of distance you may come across when learning astronomy is the parsec. (D) [substeps] There are two kinds of light years: day and night. The two types of light years are known as night and day.

Ex Output:
C

Ex Input:
[header] How to maintain computer peripherals [title] Update the device firmware every 6 months. [step] The term firmware refers to the software program used by the device's components to communicate with the network and perform the various tasks required to accomplish its primary function. Manufacturers are continually offering firmware updates for computer peripherals that can significantly enhance the performance of any peripheral device. <sep> (A) [substeps] Navigate to the manufacturer's website and determine the location of the firmware downloads page. This page typically can be accessed from the " downloads " or " customer support " links located on the manufacturer's home page. (B) [title] Update your network to the point that your entire network has been updated. [step] This changes the flow of traffic on your network to clarity the drivers regarding other computers or to improve performance on your computer. (C) [title] Install a freshly installed php operating system. [step] You will hear it often when a used version of your computer exceeds an operating system's php screen limit. (D) Check this link below to learn about updating your device firmware every 6 months :. [title] Make sure your computer firmered correctly before and during boot time.

Ex Output:
A