Sub-points of a speech outline should be written in which of the following ways?

Sub-points of a speech outline should be written in complete sentences to provide clarity and ensure that the ideas are fully developed and easily understandable. This format allows the speaker to articulate their thoughts clearly and helps in structuring the speech effectively. Writing in complete sentences ensures that every point is expressed fully and can be easily referenced during preparation and delivery. This practice also increases the likelihood of the speaker conveying their ideas without ambiguity, making the structure of the speech more coherent and organized.

The other formats do not provide the same level of clarity and completeness. Infinitive phrases may lack the necessary context, while questions could be less definitive and may not convey a clear point. Complete paragraphs, on the other hand, could make the outline cumbersome and detract from the quick-reference aspect that outlines are meant to serve.