Read these sentences from the text. A major turning point came in 1889. Two European researchers, Oscar Minkowski and Joseph von Mering, removed a dog's pancreas, an organ that lies behind the stomach. They hoped to figure out the pancreas's function. A short time later, the dog developed symptoms of diabetes—thirstiness, weight loss, and blurred vision—and eventually died.

What can you conclude based on this evidence?
Because doctors understood the symptoms of diabetes, they could treat the disease by making patients drink more water.
Despite the dog dying when researchers removed his pancreas, doctors developed special glasses to treat blindness for diabetics.
After the dog developed diabetic symptoms, researchers understood that the liver could be removed to treat the disease.
Once researchers understood the pancreas was related to diabetes, they could study that organ more closely for a solution.