I believe it's "macrosociology"
Answer:
Association Fallacy
Explanation:
Sarah has "fallen prey" of an <u>association fallacy</u>. A very common error in our society. The association fallacy is a logical one, and it means, in simple words, that someone assumes that one person belongs to a certain group by simply looking at the other person´s appearance.
For example: Besides the very good example given in the question there are thousands or million of other situations in which we can see this happens: people often categorize other´s by their <em>looks</em>, <em>hairstyles</em>, <em>piercings</em>, <em>skin color</em>, <em>clothes</em>, <em>accent</em>, etc.
Sarah, i would think, was prey of the most common falacies of all: the <u>association falacy</u>.
I honestly dont know the answer to this