A 10-Year-Old Girl Was Brought in to Her Physician's Office

A 10-year-old girl was brought in to her physician's office because she had been complaining that she was thirsty and had to go to the bathroom all the time.She had lost 15 pounds over the last 6 months and was more irritable than usual,especially after meals.The girl's fasting blood glucose was 575 mg/dL,her C-peptide was 0.5 ng/mL,and she had autoantibodies against glutamic acid decarboxylase and insulin.This girl has:

A) Hashimoto's thyroiditis
B) acute glomerulonephritis
C) type 1 diabetes
D) progressive systemic sclerosis