The correct response is d). Consciousness includes awareness of all things that the body is subjected to, as well as awareness of our own internal thoughts and feelings. It is a very complicated field of study in psychology, physiology, and neuroscience, as researchers try to discover how consciousness arises from the firing of neurons in the brain, and of how disorders of consciousness arise, disorders that include symptoms such as coma, locked-in syndrome and vegetative state.
"While other conditions may cause a moderate deterioration (e.g., dementia and delirium) or transient interruption (e.g., grand mal and petit mal seizures) of consciousness, they are not included in this category." (Wikipedia)
Spatial unconsciousness, such as that seen in hemi-spatial neglect, is a condition in which patients have no awareness of one complete side of their spatial field.