The correct answer is they maintain the blood glucose level in the body.
Counterregulatory hormones are hormones that oppose the function of another hormone. Counterregulatory hormones on insulin tend to increase the glucose blood levels (insulin decreases it) and thus, maintain the glucose balance. Counterregulatory hormones of insulin are glucagon, epinephrine, norepinephrine, cortisol, and growth hormone and they raise the level of glucose in the blood by promoting processes like glycogenolysis or gluconeogenesis.
