Helpful previews, summaries, and transitions in an oral presentation are examples of verbal signposts. Thus, option d is correct.
Verbal signposts refer to indicators that help the audience to understand the course which the presentation is taking. It helps to keep the audience engaged in the presentation and also explains the slides that are being played.
Criteria refer to the conditions for the fulfillment of a purpose. The given examples do not act as examples of criteria.
Conclusions refer to the ultimate opinion that is formed after the entire presentation is shown. The given examples form a part of the presentation, not the conclusion. One can conclude from seeing these examples.
Supporting materials refer to reference items. The products given in the examples are the main sources guiding the presentation, not the supporting materials.
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The complete question is provided below:
Helpful previews, summaries, and transitions in an oral presentation are examples of
a) criteria.
b) conclusions.
c) supporting materials.
d) verbal signposts.
