Which of the following answer choices BEST describes the appropriateness of Julie’s data sample in the following vignette?

Julie’s purpose for the study involves understanding “how confident teachers who have recently graduated from college feel in a classroom setting”. So, she is interviewing teachers “who have recently graduated from college”. This is appropriate. The fact that they are teaching in a middle school provides further detail, but does not limit the scope of the project, nor does it make the scope too large.
Bias is showing favor toward (or prejudice against) a thing, person, or group when compared to another. This type of comparison, upon examination, is usually considered to be unfair in some way and will impact the outcome or reflection of an experiment, study, or observation.