When Blood Pressure Falls Below Normal,what Happens to Restore the Blood

When blood pressure falls below normal,what happens to restore the blood pressure toward normal?

A) The rate of firing in the afferent nerves originating from the carotid-sinus and aortic-arch baroreceptors increases.
B) The rate of firing in the afferent nerves originating from the carotid-sinus and aortic-arch baroreceptors decreases.
C) The rate of firing in the afferent nerves originating from the carotid-sinus and aortic-arch baroreceptors does not change.
D) The peripheral arterioles undergo vasodilation.

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