Which of the following is the MOST effective way of teaching a complex concept?

A.
Presenting the concept in a formal lecture and having the learners take notes

B.
Advancing theories relating to the concept that will be new and unusual to the learners

C.
Employing activities that facilitate discussion as an aid in clarifying the concept

D.
Introducing the concept in a take-home reading assignment that is accompanied by factual questions about the reading