Why is Higgins so angry now? If you were to take sides in this argument, on whose side would you be? Defend your answer. (Act 4)

Does this question pertain to the "slipper" argument. If so, I would take Eliza's side. She isn't responsible for Higgin's belongings, and she is confused as to what he next step will be in life. The bet is over..... she needs to know where she stands.