Final answer:
Jada's return of fear and anxiety towards the dentist demonstrates spontaneous recovery, as her previous conditioned response reemerges after a period of absence. The correct option is B).
Step-by-step explanation:
The scenario described with Jada experiencing a panic about her root canal after initially overcoming her fear of the dentist is an example of spontaneous recovery.
This psychological phenomenon occurs when a previously extinguished conditioned response reemerges after a period of no exposure to the conditioned stimulus.
In Jada's case, her fear and anxiety towards dental visits had been extinguished, but the stress of an upcoming root canal brought back her old conditioned response of fear and panic. Option B) is the correct one.