Which of the following correctly describes how positive and negative feedback are different? A Positive feedback moves a system closer to its set point, while negative feedback moves a system further from its set point. B Positive feedback occurs only in response to stimull while negative feedback can occur in the absence of stimuli. C Negative feedback requires the detection of stimull, while positive feedback functions independently of stimuli. D Negative feedback returns changes in a system back to a set point while positive feedback amplifies changes in a system.