Question

which is the main persuasive appeal used in this ad? studies show that duophase clinical strength toothpaste is 96% as effective as a professional dental cleaning. ethos (character) logos (reason) pathos (emotion)

Explanation:

The ad uses statistics ("96% as effective") and a comparison to a professional dental cleaning, which are elements of logical reasoning. Logos appeals to reason and evidence.

Answer:

logos (reason)