Tanya Is Allergic to Birds

Multiple Choice

Tanya is allergic to birds. Tanya's friend, Skylar, has a roommate who has birds. Whenever Tanya visits Skylar, Tanya's eyes start to water and itch even before she enters Skylar's apartment. Tanya's watery and itchy eyes persist even after Skylar's roommate and her birds have moved out. After a while, Skylar stops having the allergic reaction before she enters Skylar's house. Then, one day after not visiting Skylar for some time, Tanya's eyes start to water and itch again when she enters Skylar's house. The recurrence of Tanya's allergic reaction is BEST described as:

A) acquisition.
B) generalization.
C) extinction.
D) spontaneous recovery.