The correct answer to this question would be alternative B)"foul-breathed"
<em>Guizi</em><em> </em>is a Chinese slang term for foreigners, and it's used as an insult, being even considered racist an deprecating. <em>Yang Guizi</em>is more related to Westerners, as if it were a specific term to insult Westerner foreigners.
With that in mind, the best option in the question would be alternative B.
