Use the Information Below to Answer Questions

Use the information below to answer questions
In 2007, Swedish researchers published results from a study in which they followed about 2000 obese patients who had undergone weight-loss surgery-either gastric bypass or surgical banding-over 15 years and compared them with about 2000 similarly obese people who didn't have surgery but who were counseled in diet and exercise. One goal of the study was to determine whether bariatric surgery led to greater weight loss than diet and exercise counseling.
-In this study,the control group was made up of _________.

A) the patients who had gastric bypass surgery
B) the patients who had gastric banding surgery
C) the patients who had no surgery but were counseled in diet and exercise
D) patients who received neither surgery nor counseling in diet and exercise
E) This study had no control.