Concept:The sentence uses "as if" to describe an unreal or imaginary comparison, which requires the subjunctive mood.
Explanation:The phrase "as if" signals a situation that is not actually true.
In English, such hypothetical statements require the subjunctive form "were."
This form is used for all subjects, including singular subjects like "she."
The options "is" and "was" indicate real or factual states, so they are not suitable here.
Therefore, the sentence must read: "She treats people as if she were better than they are."
Answer:B. were