You didn't underline anything, so we cannot know for sure what the correct answer is. However, I'll just write down the entire infinitive phrases in these sentences, and you can see the answer based on that:
1. to see a great play
2. to cheer good plays
3. to practice until you know all the plays
Answer:
A fragment :) This is because you don't know anything else..Yes, the rabbit was picked up but WHO picked the rabbit up?
Explanation:
