Which sentence in this excerpt from Nathan’s memoir, "The Big Race," reflects the main idea of the story? Being a teenager can be a real challenge. A million different people have a million different expectations from you. Your mother wants you to play soccer, while your brother wants you to take up football. I have definitely felt the weight of these expectations. When I was 13 years old my mother signed me up for the school track team. “I am not good at running,” I would whine every time she pushed me to try. I could barely run a mile without getting all tired and exhausted. I did not have the body of an athlete. I was this little, skinny kid with the stamina of an old man. I hated it.