Researchers were interested in whether individuals who used websites like Yelp were willing to pay more for their meal. Specifically, is the price point of an establishment related to the customer satisfaction rating. To investigate this question researches used the existing information posted on satisfaction surveys to evaluate this relationship. They found that as customer satisfaction ratings increased so did the average cost per meal. Explain why and the answer should compare the characteristics of the study to the research design chosen.

a. Correlational Research
b. Case study
c. Observational study
d. Archival Research
e. Experimental Research