It is acceptable to use yourself as a presentation aid

Based on research about the effectiveness of speeches, which of the following is correct?

a. The effectiveness of one-sided and two-sided presentations is the same. b. One-sided presentations are more effective than two-sided presentations. c. The effectiveness of one-sided and two-sided presentations varies. d. Two-sided presentations are more effective than one-sided presentations.

In speeches organized around a temporal pattern, the main points are structured around their physical relationship with one another, for example, their geographical relationship to one another

a. True b. False Indicate whether the statement is true or false