The correct answer is B) an anthropologist from Mexico wants to study the education of illegal immigrants living in the United States.
The scenario that has the most potential for research bias is "an anthropologist from Mexico wants to study the education of illegal immigrants living in the United States."
Research bias happens when the researcher is influenced by its belief systems, emotions, or past experiences. So in the case of the question, the Mexican anthropologist could have the most potential for research bias because many illegals from Mexico cross the Mexican-US border to live and work in the United States. Probably, he could identify his case with the subjects of the study.