I'm pretty sure the answer is
B.) To see if your exercise frequency is enough
Your spinal cord is protected by the vertebral column (also known as the spinal column or backbone). The human spinal column is made up of 33 bones - 7 vertebrae in the cervical region, 12 in the thoracic region, 5 in the lumbar region, 5 in the sacral region and 4 in the coccygeal region.
To increase their range of motion. This also helps prevent soreness and cramping.
Painful periods.
pain in the lower abdomen before and during menstruation.
cramps one or two weeks around menstruation.
heavy menstrual bleeding or bleeding between periods.
infertility.
pain following sexual intercourse.
discomfort with bowel movements.