question: What can cartilaginous fish eat?
choices.text: bone marrow other animals calcium and protein scales or plates rocks small grasses hornworts bubbles
choices.label: A B C D E F G H
formatted_question: What can cartilaginous fish eat? (A) bone marrow (B) other animals (C) calcium and protein (D) scales or plates (E) rocks (F) small grasses (G) hornworts (H) bubbles