Brenda Was Startled When a Large Shadow Unexpectedly Passed Across

Multiple Choice

Brenda was startled when a large shadow unexpectedly passed across her living room window. When she realized that it was just a cloud passing in front of the full moon her racing heart began to slow down, and her blood pressure started to return to normal. These physical reactions were triggered by Brenda's

A) parasympathetic nervous system.
B) somatic nervous system.
C) sympathetic nervous system.
D) hippocampus.