A rapidly developing, acute disturbance in attention and orientation that makes it very difficult to concentrate and think in a clear and organized manner is:

A) delusional disorder.
B) delirium.
C) Alzheimer's disease.
D) dissociative disorder.

Acute Disturbance

An intense and sudden onset of a disturbance, such as psychological distress or environmental disruption, that requires immediate attention.

Delirium

A rapid onset of confusion resulting from alterations in brain function that is temporary and often reversible, marked by a disturbance in attention and awareness.

Concentrate

The act of focusing one's mental or physical effort on a particular task or activity, aiming to enhance efficiency or performance.