The correct option is A D
D represents pancreas. Insulin is a hormone produced by the pancreas that regulates glucose levels in the blood. When the glucose level is high, the pancreas releases insulin which converts glucose to glycogen in the liver. The pancreas releases another hormone, glucagon when the blood sugar levels fall. This causes the cells in the liver to turn glycogen back into glucose which can then be released into the blood. The blood sugar levels will then rise.