The Mann-Whitney U Test Is Used

The Mann-Whitney U test is used:

A) to analyze unequal sample sizes when the inequality was planned or reflects actual differences in a population.
B) when subjects are treated as a factor along with one's manipulated independent variables.
C) when the dependent variable is a dichotomous decision.
D) to evaluate the significance of a difference between two independent groups when the dependent variable is scaled on at least an ordinal scale.