“It was an amazing privilege – and though I left early, I was transformed by my years at Harvard, the friendships I made, and the ideas I worked on.” The underlined word in the sentence implies（ ）.

A、an opportunity Gates has been waiting for when he took a look back
B、a special right or advantage that Gates had when he took a look back
C、a big surprise has been given by Gates when he took a look back
D、a deeper reflection made by Gates when he took a look back