In Montessori's View, a Teacher Who Needs to Shout at His

In Montessori's view, a teacher who needs to shout at his or her children is probably making the following mistake: The teacher

A) has not set forth the class rules clearly and forcefully
B) hasn't learned to use more subtle methods of control
C) is using individual rather than group techniques of classroom control
D) is not using materials that absorb the children's interests