In one study, some children who enjoyed drawing were promised a reward for using Magic Markers, and some were not promised the reward. The researchers recorded how likely the children were to use the markers later on. Which alternative CORRECTLY names and identifies the variables in this study

The 6th amendment's guarantee of a speedy and public trial is aimed at a. deterring potential criminals by fear of swift and certain punishment. b. trying those accused of crimes without undue delay and avoiding secret trials. c. eliminating overcrowded dockets in the nation's criminal courts. d. preventing jurors from being unduly influenced by public opinion.