Final answer:
When adjusting the transition duration on a slide, choosing a moderate time (1-2 seconds) is typically preferred for clarity and flow, unless the presentation requires quicker transitions. The correct multiple-choice option is (c).
Step-by-step explanation:
The question asks about modifying the transition duration on a slide in a presentation. It is important to note that the adjustment of transition duration can significantly affect the flow and pace of a presentation. The precise adjustment, whether to speed up or slow down the transition, typically depends on the desired impact and the content of the presentation.
For a smoother and possibly clearer understanding, a moderate transition time such as 1 or 2 seconds is often preferred, although a faster transition can be used if the presentation demands quick switches without drawing attention to the transitions themselves. The correct multiple-choice option is (c).