Helping Gerti

At a critical moment in the mountain girls' training at the academy, they must all pass an oral test in order to attend the ball with the prince. At one moment, Miri notices Gerti struggling to answer the question. Convinced it would be unfair for the girls to be banned from the dance if they can't pass the test, Miri finds a way to help Gerti get the answer through quarry-speech. Do you think Miri did the right thing or not? Why?