Which One of the Following Is the Best Example of a Signal

Multiple Choice

Which one of the following is the best example of a signal in teacher-directed instruction?

A) Ms. Allen encourages her students to relate the new material to things they already know.
B) Mr. Berke's enthusiasm about science is evident in every lecture he presents.
C) Mr. Christiansen gives students a list of the important concepts he'll be describing in class that day.
D) Ms. Driver looks sternly at two whispering students who are obviously not paying attention to the video she is showing.