Final answer:
The issue with insulin for a diabetic is that the pancreas does not release enough insulin, or the cells are resistant to insulin option (b). This leads to high blood glucose levels.
Step-by-step explanation:
The issue with insulin for a diabetic is that the pancreas does not release enough insulin, or the cells are resistant to insulin option (b). Type 1 diabetes is caused by the pancreas not producing enough insulin, while type 2 diabetes occurs when the body cells cannot use insulin properly. Without enough insulin or insulin resistance, the cells are unable to take up glucose from the blood, resulting in high blood glucose levels, or hyperglycemia.