In response to an increasing blood glucose level the human body will normally

Insulin and glucagon are hormones secreted by islet cells within the pancreas. They are both secreted in response to blood sugar levels, but in opposite fashion! ... Although there is always a low level of insulin secreted by the pancreas, the amount secreted into the blood increases as the blood glucose rises

Its either c or d. i would go with d though, because im not sure if its legal in all of the us