72. Why do the authors think that it is “almost incredible that, over the thousands of years of ourevolution, body language has been actively studied on any scale only since the 1960s”?
(A) Because ancient Philosophers used to study nonverbal communication.
(B) Because body language is such an important form of communication.
(C) Because speech is still viewed as our main form of communication.
(D) Because body language plays only a minor role in our communication.