Will give brianliest! which of the following is true about diabetes. a: the pancreas overproduces glucose, and so insulin must be injected to reduce glucose levels. b: the pancreas underproduces glucose, and so insulin must be injected to increase glucose levels. c: the pancreas overproduces insulin, and so glucose must be injected to regulate insulin levels. d: the pancreas underproduces insulin, and so insulin must be injected to regulate glucose levels.