3. What is AIDS? A. O The stage of HIV infection when the CD4+ Cell count is 200 Or below B. O A group of symptoms that develop during the last stages of HIV C. O Acquired Immunodeficiency Syndrome D. O All of the above

Which statement best illustrates that problem solving can create new medical devices? robert hooke was in charge of verifying the information that was sent to the royal academy. william harvey did experiments with apes to learn about the circulatory system. the stethoscope was invented because the physician did not want to put his head on women's chests to listen to their heart and lungs. anton van leeuwenhoek was a very curious man and looked at just about everything under this microscope.