Javier is researching why people believe facts that have been disproven. He randomly selected 30 participants and randomly assigned them two groups, each of which underwent an fMRI scan. Javier studied the differences in their brain structures as one group was given informati to support their beliefs and the other group was given information to refute their beliefs. Javier's study is an example of Elimination Tool Select one answer A a correlational study. B an ex post facto study. C a naturalistic observation. D a survey. E a controlled experiment.