B. That she is not totally under her father’s control
Miranda, emotionally affected by all that was happening, seems to suspect that his father has "art", (magic or supernatural powers) and that he was the one who created the terrible storm that was doing great harms to the people and the ships, and she continues by asking him to put an end to it, which demonstrates Miranda's position toward his father, she does not talk out of full fear, submission or confusion, but of determination. She asks for a straightforward thing: "to allay the waters".