Who says the following and why? "The great secret . . . is not having bad manners or good manners or any other particular sort of manners, but having the same manner for all human souls: in short, behaving as if you were in Heaven, where there are no third-class carriages, and one soul is as good as another. "
a) Pickering is trying to convince Higgins to be more polite.
b) Mrs. Higgins is trying to convince Higgins to be more polite.
c)Higgins is telling Eliza that it's okay to treat people badly as long as you treat everybody badly.
d)Eliza is desperately pleading to Higgins for him to finally show her at least a little bit of respect.