Although correlational studies cannot demonstrate causality, on level they are often preferable to , because they do not involve people and possibly exposing them to risk of harm. And on level, even without establishing causation, correlational studies can be useful for .

Bob: coke is baby pandas.jim: what? how do you figure that coke is baby pandas? bob: because this book says so.jim: how do we know the book is correct? bob: because it says that coke is baby pandas.jim: how does that prove the book's accuracy? bob: because it's statement involving coke and baby pandas is correct, therefore it is accurate.jim: how do we know that it's correct? bob: because we have concluded that the book is accurate, and therefore the statement is correct.therefore, coke is baby pandas.

Ithink it's a, but i might be wrong