Dr. kline, an environmental psychologist, conducts a study to examine whether visiting zoos causes people to have more positive attitudes toward environmental conservation. he asks a group of 45 people attending the zoo on a saturday morning about their attitudes. he finds that 69% of the people report having a positive attitude after their visit. which of the following is true? he can make a strong causal claim about the effect of zoo visits on environmental attitudes his study does not qualify as an experiment he does not have a dependent variable his control group is people who did not visit the zoo