21. The passage is best described as being told from the point of view of a philosopher who is:
A. discussing metaphysical questions that have troubled
philosophers since the time of Descartes.
B. presenting in chronological order the key events in
his thirty-year professional career.
C. reflecting on his own early, developing interest in
philosophy and in scholarship generally.
D. advising professional educators on how to get
more students to study philosophy.