A recent headline on a health website reads "Golfers Live Longer," and the article refers to a study that found that "golfers' average life expectancy was 5 years longer than other people." a) The explanatory variable is _______________________ b) The response variable is _______________________ c) Does the information in this study appear to come from an observational study or a randomized experiment? Explain: d) The wording of the headline implies a cause and effect relationship between the variables. Assuming that researchers found an association between these variables, should we conclude causality from this study? Explain