Which Scenario Describes Spontaneous Recovery

Which scenario describes spontaneous recovery?

A) Gabby is a former cocaine user. Now that she no longer uses, her hands no longer shake and her heart no longer pounds when she hears a car pull into her driveway, like her dealer used to do in his car.
B) Gabby uses cocaine. She no longer feels quite the same rush as she did when she fist started using.
C) Gabby is a former cocaine user in recovery. Although she hasn't had any symptoms in weeks, her hands shake and her heart pounds when she hears a car pull into her driveway, like her dealer used to do in his car.
D) Gabby uses cocaine. When her dealer pulls into her driveway, her hands shake and her heart pounds, even though she has not consumed the drug.