Question

which rhetorical appeal is primarily used in this ad?
3
4
years of
times as
clinical
effective.
trials.
try the new sildex face wash.
ethos (character)
logos (reason)
pathos (emotion)

Explanation:

The ad presents facts like "3 years of clinical trials" and "4 times as effective", which are logical and rational elements. Logos appeals to reason and logic by using evidence and data.

Answer:

logos (reason)