Psychological ScienceA research design is the specific method that a researcher uses to carry out their study. Which of the following is INCORRECT?

A、If you participated in a study and were asked questions about political attitudes, it would be an example of survey research.
B、Suppose you give UCSC students two measures. One asks them to rate their felt belonging at the university. and the other one measures their self-esteem. If you tested if the two scores were related, this would be an example of a correlation.
C、Suppose you study the relationship between exercise and stress. One group exercises each day for a week. The other group does not exercise. If you compared the stress levels of the two groups, it would be an example of a case study.
D、Observing children's social behavior on a playground would be an example of naturalistic observation.