Sheena's informative speech was on the life of marie curie. she covered curie's early life and marriage, her scientific achievements despite the prejudice against her as a woman, and finally, the importance of curie's discoveries on modern life. she concluded her introduction by previewing all the main points, then used an internal summary and internal preview as a transition to each of the main ideas. in her conclusion, she summarized main ideas, emphasizing the importance of marie curie's life.
what strategy to enhance audience recall was sheena using?
a. pacing the information flow.
b. reinforcing the main ideas nonverbally.
c. telling a suspenseful story.
d. building in redundancy.

D). Building in Redundancy.

Explanation:

The authors/speakers employ a variety of techniques or strategies to convey their intended idea or thought effectively to the readers.

In the given question, Sheena employs 'building in redundancy' that implies presenting the same information more than once to enhance the audience recall. She repetitively displays the same information as reflected by her presentation 'concluded..intro..previewing..main points, 'used internal summary', 'internal preview'), (in conclusion..summarized idea...importance of Curie's life'). Thus, her technique would be categorized as 'building in redundancy' which however leads to add superfluous elements in the content and fails to create the desired impact. Thus, option D is the correct answer.

the correct answer would be d.