Alicia Climbs into the Passenger Side of Her Boyfriend Bo's

Alicia climbs into the passenger side of her boyfriend Bo's car.In an attempt to impress Alicia,Bo speeds away from the curb as Alicia's head presses against the headrest.What allows Alicia to sense this linear acceleration?

A) When thrust backward,the medulla sends signals to the cortex.
B) When thrust backward,the cerebellum sends signals to the cortex.
C) Hair cells in the cochlea bend with the forward motion.
D) Hair cells in the vestibular system bend with the forward motion.