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 set up a caique parrot habitat [title] Choose a large cage. [step] Although the caique is a medium-sized bird, it needs a great deal of space. Select a cage that can accommodate this energetic parrot. <sep> (A) New cages tend to have more cages that are more hearty and safe, as these should not be bigger than 20 square feet (36 square meters) on all sides. If you're keeping a senior parrot, choose a caique that has built in cage work. (B) When it comes to caique cages, bigger is always better. [substeps] The smallest cage for a single caique should be 24 x 24 x 24 inches (60 x 60 x 60 cm). (C) The standard size for caique quarlings are 4 inches (10 cm) and five feet wide. Add a basking bulb, separate the block of wood with coarse wood shavings and place the bottom on a cooled to room temperature examination table. (D) For a more fluid experience, a small cage that you can comfortably surround your bird in will help to make the experience more comfortable. [substeps] A second enclosure can provide the environment your bird will be inhabiting without having to create a constant environment, changing its structure and its oxygen levels.

Ex Output:
B


Ex Input:
A group of people walk by in the background. We see a game of poker being played. An odd man appears in front of the camera. we <sep> (A) then see an empty room. (B) see a shuffleboard game playing in slow motion before a reporter appears on the screen. (C) see the first man, then cards being dealt and we fade to a black screen. (D) see the loser and dealer.

Ex Output:
C


Ex Input:
[header] How to trap a robin bird [title] Turn the lights off and close the blinds. [step] Quiet, dark locations will help calm the bird and make him easier to capture. If there are no blinds, wait until it is dark outside to make the robin easier to catch. <sep> (A) [title] Watch the bird for a few minutes to determine her flight path. [step] Robins like to perch on raised surfaces and move frequently. (B) [title] Fill up the cage with the right amount of early morning sun. [step] Remember to always hold the cage slightly in front of the lights so that the bird doesn't realize that it is being captured and won't accidentally squeeze in in. (C) The birds will feel more comfortable doing this than they would if you opened the windows or closed curtains after they are caught. [title] Catch the robin using a net or fishing net. (D) [substeps] If you want to catch a robin with your closed blinds, don't turn on any lights in your home. The robin will find your bright lights frightening and may give a rabbit phobia.

Ex Output:

A