The answer is D.
Explanation: The entire story was about Leanne making herself do multiple things and not have enough time for all of it. The last sentence also says she knows if she had given herself more time, she could have done much better.” This is essentially the message of the story.
Process of elimination:
A - As you can see, the experience was not rewarding (“so tired she misses her alarm” “low score” “deadline”) These sentences indicate the play took too much time.
B - Although this is true, the cause of staying up late was because of the excessive amount of work she gave herself. Also, the text does not mention anything about staying up late.
C - This is the exact opposite of what the author intended. Yes, this is what Leanne thought since she prioritized her friends over everything else she had to do. However, the whole point of the story was to prove that prioritizing your time is important.
