To Use the Wilcoxon Rank Sum Test as a Test

Multiple Choice

To use the Wilcoxon Rank Sum Test as a test for location, we must assume that

A) both samples are randomly and independently drawn from their respective populations.
B) the obtained data are either ranks or numerical measurements that will be converted to combined ranks.
C) both underlying populations from which the samples were drawn are equivalent in shape and dispersion.
D) all of the above