Which of the Following Is an Example of the Autonomic

Which of the following is an example of the autonomic nervous system at work?

A) Manoj enjoys listening to bird songs early in the morning.
B) Rachel's fingers flick back and forth when she watches her daughter make an exciting play during a soccer game.
C) Peter struggles to scratch an itch in the middle of his back.
D) Gina salivates at the smell of fresh bread baking in her grandmother's kitchen.