The nurse caring for clients in a nursing home is performing assessments for mental functioning ...

The nurse caring for clients in a nursing home is performing assessments for mental functioning impairments. Which of the following accurately describes these states?
 
  A) Dementia is poor judgment, impaired memory, and disorientation to time, place, situation, or person.
  B) Dementia begins with confusion, sleep disturbances, and restlessness, and progresses to anxiety, delusions, hallucinations, or fear.
  C) Symptoms of mild cognitive impairment include ongoing problems in reasoning, judgment, perception, attention, language, reading, and writing.
  D) Delirium is a progressive, irreversible, fatal neurologic disorder in which behavioral, intellectual, and emotional changes develop in fairly regular patterns.