You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
In this task, you're given a context passage, followed by a question that needs to be answered. Based on the paragraph, you must write unambiguous answers to the questions and your answer must refer to a specific phrase from the paragraph. If multiple answers seem to exist, write the answer that is the most plausible.

Tracy slept awkwardly on their new bed and was having some pain, so Tracy cracked her neck.
Question: What did Tracy do with her neck?
Solution: crack her neck
Why? The output phrase perfectly answers the question and is explicitly mentioned in the passage as well.

New input: I noticed that my alarm clock was not working. The numbers were not showing up on the screen. So I knew it was time to change the batteries. First, I checked to see what kind of batteries it used. It uses one 9 volt battery. Next, I checked to see if I had any 9 volt batteries in the house. I did not, so I knew I had to go to the store. I walked to the store and bought a pack of 9 volt batteries, and returned home. Then, I went to the alarm clock and opened the battery compartment. I took out the old battery and threw it away. Then I took a new battery out of the pack I just bought. I put it in the battery compartment and closed the compartment. Then I checked to see if the numbers were lit up. Then it was time to set the time. I checked my watch for the correct time and pushed the buttons to make the alarm clock the right time. Finally, I set the alarm time to the time I usually wake up and set the alarm for the next day.
Question: How did they put the new batteries in?
Solution:
By opening the battery compartment and removing old battery