Which line from the passage best shapes the central idea that the narrator has learned that what first appears to be a setback may actually be an opportunity?

"Her words dug into me, primarily because I had never once stopped to consider whether I enjoyed my time at the hospital."

"But there’s no doubt that some misfortunes turn into pivotal moments that can alter the course of a person’s life for the better."

"The rejection letter from my Ivy League school of choice was the first major obstacle I encountered in my grand 10-year plan."

"I planned to achieve everything my parents expected, and more."