You Discover That a Holistic Treatment Called "Ear Candling" Involves

You discover that a holistic treatment called "ear candling" involves putting the end of wax-coated cloth cone (a "candle") into your ear and lighting it on fire,letting it burn to within about 4 inches of your face,and then repeating with a new candle.This process is supposed to remove tension,anxiety,and stress from your body.Which of the following statements or questions would NOT be helpful in scientifically evaluating these claims?

A) Is there a way to clearly measure the amount of tension,anxiety,and stress in the participants before and after ear candling?
B) Have there been any studies that measured tension,anxiety,and stress in individuals before and after ear candling and compared these results to control groups?
C) Has ear candling been used for centuries by many different cultures?
D) Have there been any reproducible studies that compared ear candling in individuals who have an earache with those who do not have an earache?