Researchers Study the Impact of Internalized Bias on Patient Care

Researchers study the impact of internalized bias on patient care. Nurses complete a survey which determines a score for their internalized bias from 0-100. Without knowing the internalized bias score, patients are asked to rank the subsequent care they receive from the nurse as poor, fair, good or exemplary. In this study your independent variable is measured at what level of measurement?

A) Nominal
B) Ordinal
C) Interval
D) Ratio