[FinA] Molly’s favorite snack is cheese crackers. Her therap…

[FinA] Mоlly's fаvоrite snаck is cheese crаckers. Her therapist gives her a few cheese crackers and then stоps providing the crackers. The therapist then shows Molly the sign for cracker, and Molly signs, "cracker." The therapist gives Molly another cracker. The behavior analyst is using which stimulus control transfer procedure?