Long after being bitten by a stray dog, alonzo found that his fear of dogs seemed to have disappeared. to his surprise, however, when he was recently confronted by a stray dog, he experienced a sudden twinge of anxiety. this sudden anxiety best illustrates:

Alonzo is experiencing spontaneous recovery. Spontaneous recovery occurs after a long time has passed after a traumatic incident that originally caused fear. As more time passes, the anxiety of the memory gets less and less. When memory of the event is triggered, spontaneous recovery can occur and cause anxiety.