Final answer:
The most effective strategy for inspirational speaking is employing a dynamic speaking style, as it engages the audience emotionally and makes a lasting impact. The correct answer is option d.
Step-by-step explanation:
One of the most successful strategies a speaker can use in inspirational speaking is employing a dynamic speaking style. While strategies like memorizing the speech, using charts and graphs, and incorporating hypothetical examples can also contribute to an effective presentation, a dynamic speaking style engages the audience on an emotional level, often motivating and inspiring them through the use of tone, body language, and varying vocal pitches. It is important to engage audience members and make a lasting impact, which is more likely to be achieved through dynamism and passion in the delivery of the speech rather than just the content itself.