Final answer:
Complications of untreated Type I diabetes include ketone production, which can lead to ketoacidosis. Other symptoms include frequent urination and excessive thirst due to dehydration.
Step-by-step explanation:
Complications of untreated Type I diabetes include Ketone production (C).
In Type I diabetes, there is insufficient insulin or it is not functioning properly. This leads to less glucose being sent to muscles, causing the muscles to use fatty acids for energy production. The excessive breakdown of fatty acids results in the overproduction of ketone bodies, which can accumulate in the blood and lead to ketoacidosis.
Untreated Type I diabetes can also cause increased dehydration due to high osmotic pressure from elevated glucose levels, resulting in frequent urination and excessive thirst.