Which Are Actions of the Erector Spinae Group

Which are actions of the erector spinae group?

A) flexion of the trunk at the spinal joints and anterior tilt of the pelvis at the lumbosacral joint
B) extension and contralateral rotation of the trunk at the spinal joints
C) extension and ipsilateral rotation of the trunk at the spinal joints
D) extension of the trunk at the spinal joints and posterior tilt of the pelvis at the lumbosacral joint