Using index cards will improve a presentation because they make the content more interesting they keep the audience from following along they make the research more valid they keep the presenter from reading the speech

D. They keep the presenter from reading the speech

*(just took test and this was correct answer)*

they keep the presenter from reading the speech

Reading straight from the slides is a presentation style that is poor, boring, and unhelpful, so using index cards helps the presenter to summarize each slide and write a few sentences to explain each segment of the speech.

yes

explanation:

not concrete, existing in thought or as an idea but not having a physical or concrete existence