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". 

Example Input: A large group of people are seen moving around on exercise bikes. the group <sep> (A) kicks around one another while others watch on the side. (B) move together while the camera pans around. (C) moves around the road and jumps on and off the exercise bikes. (D) rides around, bumping into one another.
Example Output: B

Example Input: [header] How to convert miles to meters [title] Convert statute (or land) miles to meters. [step] There are 0.000621371192237 miles in 1 meter. There are 1 , 609.344 meters in one mile. <sep> (A) You can also convert miles to meters by substituting inches with miles. [substeps] For example, when a marketed car is covered in miles miles, it is known as a nautical miles! . (B) [title] Understand that the difference between miata and philips is that the length of the number obtained were identical. [step] The number makes up 5 of the cube kilometers in a specific measure. (C) [substeps] Although there are different definitions of miles (such as a nautical mile), this conversion refers to a " statute mile, " sometimes called a " land mile. " that's the common way you would measure length and distance in the united states. (D) By earning " cos " (the number of miles per kilometer), you will earn 1609.6 miles in 296 meter increments during your monthly tillings and potty breaks. [substeps] The number of miles you can view by using the " lines " locator tool will vary depending on your region or the types of distances you find in the map.
Example Output: C

Example Input: [header] How to write unit tests [title] Map your program into units. [step] The key aspect of a good unit test is that it checks just one portion of a program. Whether you are looking to test an existing program, or planning tests for a program that isn't written yet, you'll need to break it down into discrete parts (" units "). <sep> (A) This information helps to save work for lab experiments which most programs create. [substeps] Each unit should be considered one unit for speed. (B) You'll then write a unit test for each one. [substeps] The definition of a " unit " varies widely depending on the type of program you are developing. (C) [substeps] In units 6-12, a unit of a program 18-24 is integrated into a unit's classroom to evaluate its performance. Unit study quizzes are also designed to determine a potential future success in units testing and practices. (D) For instance, you will need to review 2.5 units of your current program, which will do most of the work for you. [substeps] You will study process units to the letter, but you will not actually study it.
Example Output:
B