A researcher is interested in whether mindfulness meditation impacts general anxiety levels. A group of 90 individuals have a 15-minute guided mindfulness meditation session individually in the lab, and another group of 76 individuals sit in a quiet room for 15 minutes. Their anxiety levels were measured by using The Beck Anxiety Inventory where the minimum score is 4 and the maximum score is 64. On what scale is the dependent variable measured? A. Ordinal scale B. Interval scale C. Ratio scale D. Nominal scale E. Categorical scale