Vivian was afraid of dogs after being bitten by a neighbor's dog. However, she conquered her fear during a visit to the animal shelter. Two weeks later, though, she experienced panic when a passing...

Vivian was afraid of dogs after being bitten by a neighbor's dog. However, she conquered her fear during a visit to the animal shelter. Two weeks later, though, she experienced panic when a passing dog barked and lunged at her while she played in her front yard. Which term best describes what happened to her fear?

 Spontaneous recovery

 Instinctive drift

 Counterconditioning

Stimulus discrimination

Spontaneous extinction