Q: Keith is a doctor in a local hospital. Today, he is seeing three patients, patient A, patient B, and patient C. Patient A has been suffering from hepatitis B all his life; patient B is recovering from hepatitis B on his own; and patient C doesn't have hepatitis B. Keith would now compare the symptoms of these patients. Would patient A more likely or less likely risk a damaged liver than patient B?
A: more likely

Q: Sam and Ned went on vacation, The 2 friends partied nights and spent their days on the beach. Sam started getting flu like symptoms, so he went to the doctor's office where he found out that he was infected with HIV. Ned got scared when he heard what happened, but fortunately he was OK. Which friend had a virus that causes Acquired Immunodeficiency Syndrome?
A: Sam

Q: Two students studied for the biology exam. Ken studied about global warming, while Hank studied about ice ages. Which student learned less about extinction?
A: Hank

Q: Karen studied animals in school. She started studying predators for a school presentation. She liked it. Her friend Molly liked cows, sheep and other herbivores, so she decided to do a presentation about grazers, and their role in nature. Which girl learned less about animals that keep grass from growing out of control?
A:
Karen