Because Carrie's friend Emily often brings home-baked goodies when she visits, Carrie feels her mouth water at the sight of Emily. For one week Emily, brought her cousin Michelle with her whenever she visited Carrie. A few weeks later, Carrie bumped into Michelle at the store. In this scenario, blocking would be demonstrated if Carrie:

- no longer feels her mouth water when she sees Emily.
- still feels her mouth water when she sees Emily.
- does not feel her mouth water when she sees Michelle at the store.
- feels her mouth water when she sees Michelle at the store.