How does a person's field of experience influence a communication event?

After teaching only the first module of a chapter, Tracy gave a surprise test to her students, which covered all the modules of the chapter. She said that each student needed to score 75% to pass the test. What mistake did Tracy commit?

a) Ineffective goal settin b) Incompetent communication c) Poor-quality information d) Inappropriate channel

Which of the following is considered the best and most impactful kind of testimony?

a. Insincere b. Statistical c. Unqualified d. Expert