Question

which is the main persuasive appeal used in this ad?
the results are in.
in laboratory tests, the vilaplus
vacuum picks up more dirt than
the leading brand.
ethos (character) logos (reason) pathos (emotion)

Explanation:

El anuncio usa "the results of laboratory tests" para persuadir, lo que se alinea con logos, que es la apelación a la razón y la lógica. Ethos se refiere a credibilidad del emisor, y pathos a emociones, lo que no se ve aquí.

Answer:

logos (reason)