Giving a brief hug to a coworker that you have come to know well when you run into him or her downtown is an example of _____ touch

An iris is

a. a special blue light filter. b. the focal point in classical composition. c. a powerful wide-angle lens. d. a circular or oval mask that can open up or close in on a subject.

People suffering from public speaking anxiety tend to use more ________, such as "um" and "you know," than they otherwise would.

A. muscle tensions B. vocal quivers C. filler words D. random movements