The purpose of a study can be described as Select one: O O a. Descriptive, causal or experimental b. Descriptive, predictive or exploratory c. Descriptive, causal or formal d. Descriptive, causal or predictive O The purpose of a study can be described as Select one: O O a. Descriptive, causal or experimental b. Descriptive, predictive or exploratory c. Descriptive, causal or formal d. Descriptive, causal or predictive O