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 love reading [title] Consider why you want to read. [step] People read for a wide variety of reasons. Before you pick up a book, consider what you want to get out of reading. <sep> (A) Some people like reading books that teach them new skills, from computer programming languages to skills for hunting or camping. Other people enjoy narratives, whether fictional or biographical, to transport them to other times, worlds, or situations. (B) Maybe you want to learn how to read to overcome your depression, or maybe you want to learn how to fix the problem you have with your previous reading. Identify, by reading, why your brain is going through a few different positions and see which position you are thinking about reading in. (C) Are you concerned about losing weight? Good books can have a much greater impact on your emotions, yet the answers to most of your questions are still unknown. [substeps] Do you want a great book in mind? Like many writers, you may have been hoping a novel could express a feeling of still love while taking care of your children. (D) [substeps] You can visit your local library, read at a coffee shop, or do some more reading. You can also read online if your websites want you to read.

Ex Output:
A


Ex Input:
[header] How to elevate your hand while sleeping [title] Sleep on your back or side. [step] In order to elevate your hand while you're sleeping, you'll need to sleep on your back or on the side opposite of the arm that needs elevation. This is the easiest resting position for elevating your hand. <sep> (A) [substeps] Lying on your side not only has been shown to help alleviate hand inflation, but it also improves circulation in and around the hand and wrist joints. It's also more efficient than sleeping on your side. (B) [substeps] You can use a pillow to support your arm when you start to feel like your hand's elevating off the ground. Place a rolled up towel over your head to help prevent air from pooling near your arm. (C) [substeps] Sleeping on your stomach won't allow you to elevate your hand as easily. It's much harder to prop it up from behind if you're lying flat on your stomach. (D) [substeps] Lie on your back with the pillow propping your head up at a 45 degree angle. Your dominant hand should support the bottom of your pillow.

Ex Output:
C


Ex Input:
A professional tennis match is played during a tournament. The players talk on headsets during the match. a man <sep> (A) is shown in a room playing peolpe. (B) prepares to serve the ball to start the match. (C) point puts the ball in the net. (D) in red waits in a lane with a basket.

Ex Output:

B