Question

a good way of ensuring whether a listener has understood a presentation is to
record all major and minor details.
identify all unknown words and phrases.
rewrite the entire presentation.
summarize in ones own words.

Explanation:

To determine if a listener understands a presentation, summarizing in one's own words shows comprehension (they can rephrase the content). Recording all details, identifying unknown terms, or rewriting the presentation don't directly measure understanding.

Answer:

D. summarize in one's own words