Final answer:
In the introduction of a well-constructed speech, a preview statement is the most likely element to be found, which outlines the main ideas and sets up the structure of the speech, effectively giving the audience a roadmap. So the correct option is B.
Step-by-step explanation:
In a well-constructed speech introduction, you would most likely find a preview statement. This element serves to outline the main ideas and structure of the speech, laying a foundation for what is to come. The introduction serves as a roadmap for the audience, articulating the speech's thesis and main points, which helps to establish a clear aim and engages the listener from the beginning. In addition to setting the stage for the ensuing argument or presentation, it provides a seamless transition into the body of the speech.
When creating a speech introduction, one should also consider the importance of establishing credibility and relevance to the audience. Though a visual aid can be a helpful tool during a speech, it is not a standard component of the introduction itself. An internal summary is typically used within the body or conclusion of a speech to recap the information presented. Therefore, the most accurate answer is B) a preview statement.