The author's experience shows that he was ______.

A．intended to be a sensible student with noble ideals
B．wanted to be an example of practicality and rationality
C．intended to be a combination of engineer and humanist
D．wanted to coordinate engineering with liberal-arts courses in college

A．practicality and rationality
B．engineering and the liberal arts
C．reality and noble ideals
D．flexibility and a value system