The highly convincing visual demonstration became valuable because D. It allowed them to assert their scientific claims.
A visual demonstration employs a picture, diagram, or piece of film to show or explain a concept or pitch a product.
By showing that the LifeSaver bottle could filter and purify water for drinking and immediate consumption, the visual demonstration allowed the makers to assert their scientific claims.
Thus, the highly convincing visual demonstration became valuable because D. It allowed them to assert their scientific claims.
Learn more about advertising with visual demonstrations at https://brainly.com/question/20274492
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