question: What do placental mammals give birth to?
choices.text: liver Vulnerable young stars the uterus embryo implantation young birds eggs eggs are fertilized
choices.label: A B C D E F G H
formatted_question: What do placental mammals give birth to? (A) liver (B) Vulnerable young (C) stars (D) the uterus (E) embryo implantation (F) young birds (G) eggs (H) eggs are fertilized