Answer:
Jane found out about Adele from Mr. Rochester:
d. She is the daughter of his mistress
Step-by-step explanation:
Edward Rochester was the one who gave Jane Eyre employment. The entire novel revolves around the secret related to Mr. Rochester. He is not polite and behaves in a rash and unconventional manner. Jane comes to know from him that Adele was Mr. Rochester's daughter with his mistress.