The changing criterion design is an experimental design primarily used to assess the effects of an intervention on a behavior that is already in the individuals repertoire It involves gradually changing the criterion for reinforcement or punishment in a stepwise fashion either increasing or decreasing the target behavior The key characteristic is that the behavior is already present and can be systematically adjusted The text explicitly states Remember changing criteria on design is not used to teach new behaviors That behavior already needs to be in the clients repertoire Options A B and D describe behaviors reducing cigarettes increasing running miles increasing dumpling production that are assumed to be part of the clients existing repertoire and can be systematically increased or decreased making them suitable for a changing criterion design Option C however involves teaching a child how to read new words which clearly indicates the acquisition of a novel skill Teaching new behaviors typically requires designs like multiple baseline or multiple probe or specific skill acquisition procedures rather than a changing criterion design