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: [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.
Example Output: B

Example Input: [header] How to read an ear reflexology chart [title] Get an ear reflexology chart online or refer to one in a book. [step] Before you can learn how to read an ear reflexology chart, you will need to get yourself a good one to consult. You can find ear reflexology charts online or in a reflexology book. <sep> (A) For best results, get a large poster size chart. The ear has 90 standardized reflexology points, so it can be difficult to read an ear reflexology chart if it is too small. (B) Read the chart aloud to yourself in the living room or in the shower, if you don't have a room to study in. [title] Read the chart in a library or in an online book. (C) [substeps] You will also need to see if any glaciers are present. These may be signs of a temperature problem. (D) [substeps] Place your index (pointer) finger on one of the pointer points at the top of a chart. Place your other finger on the other pointer point at the bottom of the chart.
Example Output: A

Example Input: We see an opening title screen. We see a girl run and perform a high jump and make it over the bar. we <sep> (A) see about 30 girls jump. (B) see her finish over the bar and retrieve the routine. (C) then see a replay and and slow motion replay. (D) see a girl throw a white ball and it flies straight across the field.
Example Output:
C