Question: Suppose six-year-old Gretchen pulls a cat's tail, and the cat scratches her. Gretchen is terrified of cats. To help Gretchen, her teacher gradually brings her into contact with cats. Gretchen looks at pictures of cats, sees a live cat in a kitty carrier, and touches a live cat. Finally, Gretchen learns to hold a cat without fear. What has happened to Gretchen? Need Assignment Help? A. spontaneous recovery B. systematic desensitization C. generalization