Which of the Following Scenarios Best Depicts Spontaneous Recovery

Which of the following scenarios best depicts spontaneous recovery?

A) Chris was bitten by a hamster when he was five years old. He is now twenty, and still will not approach any rodent-like pets.
B) Months ago, Dora stopped having panic attacks when crossing bridges. However, she had a panic attack today when crossing a large bridge.
C) Three-year-old Jorge had a close call with a hot stove when his dad was cooking, and he readily learned not to put his hand near a hot stove again.
D) After many years, Farah, the cat, finally learned to expect food whenever she heard her owner operating an electric can opener.