Self-disclosure can be an element in establishing credibility.

In his speech about volunteering for the American Red Cross, Jacob used a lot of slang, sat and leaned on the table in front of the class, and was dressed very casually. Which of the following statements BEST describes this situation?

a. Jacob adapted to his audience by making his speech more informal. b. Jacob violated the audience's space by sitting and leaning on the table in front of class. c. Jacob ignored the rule that public speaking is more formal than conversation. d. Jacob did nothing wrong by approaching this topic in a casual manner.

A biologically shared innate signal system in which a particular species uses symptoms for its communication with other members of the species is an ______ code.

a. arbitrary b. iconic c. ontogenetic d. intrinsic