椎间盘由什么构成?(Which constitutes an intervertebral disc?)

A、髓核、椎体 (
Nucleus pulposus, vertebral body);

B、纤维环及椎体 (
Fibrous ring and vertebral body);

C、髓核及纤维环 (
Nucleus pulposus and annulus);

D、纤维环及椎体 (
Fibrous ring and vertebral body)