Assuming that the following sentences are related to the stages of the scientific method, choose the correct alternative: I- Observation; II- Fact;...

Assuming that the following sentences are related to the stages of the scientific method, choose the correct alternative: I- Observation; II- Fact; III- Hypothesis; IV- Hypothesis testing. "Two researchers, Frederick G. Banting, a young Canadian doctor, and Charles H. Best, a medical student, worked on the subject in the laboratory of Professor John J. R. Mac-Leod at the University of Toronto. They extracted the secretion of the pancreas from dogs. (IV) WHEN THEY INJECTED THE EXTRACTS [PANCREATIC SECRETION] INTO DOGS MADE DIABETIC BY THE REMOVAL OF THEIR PANCREAS, THE LEVEL OF SUGAR IN THE BLOOD OF THESE DOGS RETURNED TO NORMAL, AND THE URINE NO LONGER PRESENTED SUGAR." The alternative that correctly identifies each of the highlighted sentences with each of the stages of the scientific method is:


A. I - Hypothesis; II - Hypothesis testing; III - Fact; IV - Observation.
B. I - Observation; II - Hypothesis; III - Fact; IV - Hypothesis testing.
C. I - Observation; II - Fact; III - Theory; IV - Hypothesis.
D. I - Observation; II - Fact; III - Hypothesis; IV - Hypothesis testing.
E. I - Fact; II - Theory; III - Observation; IV - Hypothesis testing.