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 handle a dog's nightmares [title] Decide whether to wake up your dog. [step] When your dog is having a nightmare, your first instinct may be to wake up your dog. However, this isn't always the best idea. <sep> (A) Waking up your dog would disrupt its sleep cycle, causing it to feel confused and possibly lash out at you. It's often better to let a dog continue sleeping through the nightmare. (B) If your dog's nightmares persist and you aren't willing to take the time to monitor your dog, it might be best to enlist the help of a veterinarian. There are several reasons for this : [substeps] When your dog is having a nightmare, your own judgment is impaired. (C) If your dog is claustrophobic or is fear fearful, you will want to be as calm as possible while your dog is having the nightmare. If the fear is mild to moderate, choosing an alternative position or location may not be a good idea. (D) While nightmares are real, traumatic experiences can also happen. [substeps] Nightmares also occur in dogs that have nightmares caused by trauma.
Example Output: A

Example Input: A pitcher pitches a ball to the batter. the batter <sep> (A) bats the ball really far. (B) is deflected by the bat. (C) misses, throwing the ball into the field. (D) takes the envelope down and lays it down.
Example Output: A

Example Input: A crowd in the background watches gymnasts performing. A gymnast runs across a floor, performing cartwheels and flips. another gymnast in an orange suit <sep> (A) does cartwheels on a beam above the audience. (B) spins in circles while performing. (C) does cartwheels and jumps a ramp using a rope on the right. (D) , jumps onto two bars and performs many flips.
Example Output:
D