Answer:
D. Stephen conducts research to understand more about the corporate executives.
Explanation:
Analyzing the information above, it is correct to say that a good presentation should be able to retain the public's attention and positively impact people. For this, it is considered that the letter D is the most relevant option for Stephan to achieve his goals in his speech, because knowing his audience in depth will be a decisive factor to align his presentation with the interests of the audience and thus retain attention and integrate them with what is being said. Therefore, research to understand more about corporate executives will lead Stephan to achieve effectiveness in his presentation.