Which of the following is an example of using nonverbal communication to complement verbal communication? a. clapping after a performance, yelling/cheering during a sporting event b. holding up a hand to indicate you do not wish to be interrupted or to stop communication c. smiling while recounting an experience you found amusing d. crossing fingers to indicate lying

The correct option is C.
Verbal communication is a type of communication in which the speaker use words to communicate his feeling and emotions. A non verbal communication on the other hand use other means, rather than words to pass across information. Smiling for instance, is a form of non verbal communication. Thus, smiling while talking, is an instance of using non verbal communication to complement verbal communication. 

Idont know which one is right   but i know that c is wrong and a might be wrong