Research by Leventhal and his colleagues (1967) was described in the text. In the experiment, the researchers showed one group of smokers a film depicting the ravages of lung cancer, gave another group of smokers a pamphlet with instructions on how to quit smoking, and exposed a third group to both the film and the pamphlets. People in the last group reduced their smoking significantly more than people in the other two groups because __________.fear was aroused and they were provided a means to reduce that fearthey were relatively light smokersthe combination increased their confidence in their ability to quitprior to the study, they reported more failed attempts to quit