In What Is a Researcher Interested When Conducting a Test

In what is a researcher interested when conducting a test of inference for independent variances?

A) Whether the population variance for one group is different than the population variance for one or more other independent groups
B) Whether the population variance for one group is different than the population variance for one or more other dependent groups
C) Whether the population mean difference for one group is different than a hypothesized value
D) Whether the sample mean of group 1 differs from the sample mean of group 2
E) Whether the population standard deviation is within a ratio of 1:4
F) Whether two groups have the same population mean and variance