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". 

A bunch of men are inside a green colored gym. They are lobbing a tennis ball back and forth. they <sep> (A) are engaged in a game of tennis. (B) bounce the ball up and down on the trampoline as they go. (C) hit the ball up high into the air. (D) knock balls off the hoops into the spectators.
A

[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.
B

[header] How to upload multiple videos on instagram [title] Update to the latest version of instagram. [step] The march 31st , 2016 update to instagram (7.19) re-added the ability to create an instagram video from multiple video clips. In addition to this, instagram has begun rolling out the ability to send videos up to 60 seconds long, which is quite the improvement over the original 15 second limit. <sep> (A) [substeps] To update your apk (website or app you've downloaded), navigate to. Click the tab to enable updates and to resize and set the photo that you need on the page. (B) These days, instagram has a continuous upload of videos from across the world. [substeps] As a result, it is highly recommended that you update to the latest version of instagram. (C) [substeps] The march 31st update is recommended for most users only, as most apps allow you to upload video from anywhere on the platform. [title] Install the app on your home screen. (D) This feature is rolling out in waves, and may not be available for you yet. [substeps] You can check for instagram updates by opening the app store and tapping the updates tab.

D