Answer:
The biggest breakthrough came in 1921 when Frederick Banting and Charles Best conducted a series of experiments one summer in the laboratory of J.J. R. Macleod at the University of Toronto. Like Minkowski and von Mering, they showed that removing the pancreas from dogs made them diabetic.
Explanation:
B. it decreases your resting heart rate
True
If you want more explanation I'm more than happy to and I hope this helps:)