When blood glucose level rises, the pancreas secretes insulin, ...

[Hawke]

When blood glucose level rises, the pancreas secretes insulin, and as a result blood glucose level declines.  When blood glucose level is low, the pancreas secretes glucagon, and as a result blood glucose level rises.  Such regulation of blood glucose level is the result of
A) catalytic feedback.
B) positive feedback.
C) negative feedback.
D) bioinformatic regulation.
E) both A and B

[Celeste]

C