Here's the remaining text that forms the question;
"Sonia sat down in the guidance counselor's office, ready to explain her
future. She was going to be a writer, she announced. All she had to do was finish high school, go to college, and then get a job of some kind something that would give her a source of income. Then, she continued, on the weekends, except for those weekends when she had soccer practice (because there was no chance she was giving that up), and as long as her friends didn't invite her to go out partying, she would write the great American novel. As Sonia finished triumphantly and looked up for approval, the guidance counselor frowned."
Answer:
D. Sonia's description of her impractical plans shows that she is more of a dreamer than a doer.
Step-by-step explanation:
Note the statement, "Sonia looked up for approval," meaning, she wanted the guidance counselor to accept her supposed plans for the future. So, we could conclude that the plot of the story is mainly focused on Sonia's plans for the future, and is thus best developed by the statement, "Sonia's description of her impractical plans shows that she is more of a dreamer than a doer."