The right answer is C. thalamus, spinal cord, somatosensory cortex.
The somesthetic system, or somatic sensory system, groups the nervous mechanisms responsible for collecting somatic sensations (the sensations of the body). This is the meaning that tells us
about the state of our body
on our environment, through our body.
Somesthesia is an integral part of different sensory modalities of perception as well as the specific senses of hearing, vision, taste, smell, balance.
It is composed of the somatosensory thalamus, spinal cord, and somatosensory cortical areas.