They speak with power and strength about a time of hopelessness.
The relationship between power and freedom is that they are both centered around feeling accomplished and dealing with the privileges of freedom or power and how having one or the other goes to show the socioeconomic status of the person who has it. Freedom and power are interconnected to give one the idea of importance and the effects of believing a cause and how this can result in either power or freedom.
Mr. Praed says he knows nothing of Mrs. Warren's profession, but his behavior indicates otherwise. However, he does not seem bothered by the fact that Mrs. Warren is a "working woman." He is nonjudgmental. As an architect, he is not of the upper class, but of the middle class.
Mr. Crofts, however, is directly involved in Mrs. Warren's profession by the fact that he owns brothels. His moral sensibility is much worse than Mr. Praed's as a result. He is a member of the upper class and feels very entitled to his wealth--also lowering his moral sensibility.
D. Students acting the parts of prisoners and guards