Read these lines: "My father looked carelessly at the title page and said, Ah! Cornelius Agrippa! My dear Victor, do not waste your time upon this; it is sad trash. But the cursory glance my father had taken of my volume by no means assured me that he was acquainted with its contents, and I continued to read with the greatest avidity." Why did the warning fail?

1. 1. The father looks carelessly and only at the title page before giving his verdict. 2. 2. The son notices this, and says the cursory glance did not assure him his father knew the contents. 3. 3. A verdict from someone who has not read the thing carries no weight, so the son keeps reading with avidity. 4. 4. Harshness is not what the son objects to; he objects to ignorance, so option A fails. 5. 5. He continues reading afterwards, so he had not finished, ruling out option B. 6. 6. The father calls it sad trash and never praises the writer, ruling out option D. _Source: Frankenstein by Mary Shelley (1818)_