Which of the three D’s is characterized by an onset that occurs rapidly over hours or days?DementiaDepressionDeliriumDiabetes

The three D’s often referred to in the context of cognitive impairments are Dementia, Depression, and Delirium. Among these, Delirium is characterized by a rapid onset of symptoms that can develop over hours or days.

1. Dementia generally develops slowly, over months or even years, as it involves progressive cognitive decline.
2. Depression can have a variable onset, but it usually manifests over a longer period rather than the rapid onset seen in delirium.
3. Delirium, on the other hand, is a serious disturbance in mental abilities that results in confused thinking and reduced awareness of the environment, and it can arise suddenly, often due to medical conditions, medications, or withdrawal states.

In summary, the correct answer is Delirium, as it is specifically characterized by a rapid onset occurring within hours or days.