When performing the good morning exercise, it is important to:
A. Have your feet under your hips, keep back flat keep legs straight.
B. Have your feet under your hips, push your hips back as you begin to bend, keep your back flat, have knees slightly bent.
C. Have your feet under your hips, push your hips back, round your back, have knees slightly bent.
D. Have your feet under your hips, keep legs straight, push hips back, keep your back flat.