According to the Text, What Is the Most Useful Attitude

According to the text, what is the most useful attitude for beginning teachers to have toward their colleagues?

A) Be ever skeptical. A great many experienced teachers have developed bad habits.
B) Be cautiously optimistic. Although poor teachers exist, dedicated teachers abound.
C) Be unworried. With rare exceptions, other teachers will be generous, helpful, and supportive.
D) Be persistently friendly. Other teachers, if they like you, will always be able to help lighten your workload by giving you materials.