Read the excerpt from "I'm Not Thirteen Yet" by Amy Bernstein.

Right away, Margaret was kneeling next to me. "Are you okay? Are you okay?" she asked. "Richard, you big jerh what were you thinking? This is my best friend, and if you want to mess with someone, don't pick her. Oh—and you stink at soccer!"

At this point, I was lying on my back, and my head shot up when I heard the words "best friend." I squinted and saw Margaret standing above me. She extended her hand. She was ready to help me up. She grinned. From then on, I knew who my best friend was. She didn't care what age I was, and never would. To this day, we both have the framed picture of us at the bus stop that first day of camp.

What significant event is described in this excerpt?

Richard knocks Jamie over during a game of soccer.
Jamie learns that Margaret is her best friend.
Margaret kneels down next to Jamie.
Jamie squints and sees Margaret standing above her