Sheena presented her informative speech on the life of marie curie. she covered curie's early life and marriage, her scientific achievements despite the prejudice against her, and finally, the lasting importance of curie's discoveries. sheena concluded her introduction by previewing all the main points, then used an internal summary as a transition to each of the main ideas. in her conclusion, she summarized her main ideas, emphasizing the importance of marie curie's life. what strategy to enhance audience recall was sheena using?