Results showed that that was a significant decrease in returnable. litter following
the enactment of the bottle bill at highway sites, but not at railroad sites (although littering did decrease), in New York. There was no decrease in returnable litter at the New Jersey sites; neither were there any significant differences found for nonreturnable litter Questions: 1. (a) What specific quasi-experimental design was used by the researchers to assess the effects of the bottle bill? (B) Explain why you classified it as you did 2. What is the operational definition of "litter" used in this study?