You are interested in determining whether allowing prison inmates to have televisions in their cells will reduce violent behavior. you measure the rate of violence in the prison, install televisions in all cells, and then measure the rate of violence again one month later to see if there has been any change. what research design have you used?

According to the article,"social credit" is question 3 options: an experiment to people talk on-line a farming experiment that hurt people under mao ze dong using someone else's data from the internet, to give or take away things such as the right to buy an airline ticket a credit you get in china for having friends in real life, and not just on social media