Answer:
D. retrograde amnesia
Explanation:
Retrograde amnesia is explained as a type of amnesia that affects memories that were formed before the onset of amnesia. For instance, someone who develops retrograde amnesia after a traumatic brain injury may be unable to remember what happened in previous years prior to that injury.
Retrograde amnesia may be caused by damage to the memory storage areas of the brain, traumatic injury, a serious illness, a seizure or stroke, or a degenerative brain disease.
