Which of the following describes diabetes mellitus?
A. It is a condition in which one has persistent hyperglycemia, which is having too much glucose in the blood.
B. It is a condition in which one has persistent hyperglycemia, which is having too little glucose in the blood.
C. It is a condition in which one has persistent hypoglycemia, which is having too much glucose in the blood.
D. It is a condition in which one has persistent hypoglycemia, which is having too little glucose in the blood.