Read the excerpt from "I'm Not Thirteen Yet" by Amy Bernstein. Gradually, Lynette stopped inviting me over after school. One day, on my way into the girls' bathroom, I overheard Lynette and Shelley Abrams discussing their after-school plans at Dale's Ice Cream. "This afternoon is going to be so much fun," said Lynette. "It's going to be you, me, and the rest of the `Fab Thirteens.' Just remember, no twelve-year-olds." I heard a toilet flush and scurried into an empty stall. Their giggles felt like needles. I heard the sinks running and knew they were tossing their locks in the mirror. This couldn't be happening. But I was quickly getting the picture that it was. What central idea do the details in this excerpt best support? canceling plans growing up being left out being in a club