Hello. You did not inform the book to which this question refers, which makes it impossible for it to be answered accurately. However, I will try to help you in the best possible way.
To find out what Jade has to say about sabrina's comment, you should analyze the tone of Jade's thoughts or lines in relation to Sabrina. The tone is the feeling that is transferred through the text. If Jade's lines or thoughts emit a positive tone it means that she agrees with Sabrina's comment, if on the contrary, the lines and thoughts emit a negative tone, it means that JAde does not agree with Sabrina.