Which of the Following Is a Two-Group Independent Design

Multiple Choice

Which of the following is a two-group independent design?

A) People with Migraine are measured on stress levels and frequency of migraine attacks
B) A group of patients with Inflammatory Bowel Disease are tested both at baseline and after an intervention to improve their symptoms.
C) People with Irritable Bowel Syndrome are compared with people with Inflammatory Bowel Disease on Cortisol levels.
D) People with lower back pain are treated by weekly sessions of acupuncture for twelve weeks to determine if their back pain reduces