Colum's Friend Asks Which Teacher to Take for His Class

Colum's friend asks which teacher to take for his class in human development next semester.Given the research on creativity and careers,Colum should recommend a professor:

A) in his seventies (who is still healthy) ,with a reputation for outstanding teaching.
B) in her forties,who is a fairly good teacher.
C) in his late twenties,who is supposed to be an excellent teacher.
D) who is a well-known researcher,but who hasn't taught much.