One Major Difference That Is Useful in the Diagnosis of Major

One major difference that is useful in the diagnosis of major neurocognitive disorder or delirium is that

A) major neurocognitive disorder symptoms develop slowly over time, and delirium symptoms develop quickly.
B) major neurocognitive disorder symptoms are usually associated with underlying medical conditions, and ^{delirium is usually the result of other factors.}
C) the initial symptoms of major neurocognitive disorder are generally more severe than the symptoms of delirium.
D) the symptoms of major neurocognitive disorder involve memory, but the symptoms of delirium are more likely to involve expressive language.