Refer to the exhibit:
Based upon the comparative ROC plot for two competing models, which is the champion model and why?
A . Candidate 1, because the area outside the curve is greater
B . Candidate 2, because the area under the curve is greater
C . Candidate 1, because it is closer to the diagonal reference curve
D . Candidate 2, because it shows less over fit than Candidate 1
Answer: B