People with diabetes can do which of the following to control their blood glucose concentration (BCG)?
a) Take insulin when their BCG is high and take glucagon when their BCG is low.
b) Take glucagon when their BCG is high and take insulin when their BCG is low.
c) Take thyroxin when their BCG is high and take calcitonin when their BCG is low.
d) Take calcitonin when their BCG is high and take thyroxin when their BCG is low.
