Lee has been feeling sad, anxious, and drinking more than usual following his retirement. His brother Todd has been having some recent challenges with memory, concentration, and thinking. Todd is MOST likely experiencing disorder, which is not among the disorders that are common among all age groups.

The correct answer is mild neurocognitive disorder

Neurocognitive disorder or organic brain syndrome, formerly called dementia, is a general term that describes impaired mental function due to a medical illness other than a psychiatric illness. Even today, the term dementia is often used interchangeably because the various disorders involve cognitive impairments and similar declines, which affect older people more often.

There are nine medical conditions that similarly affect mental functions, such as memory, reasoning and the ability to think logically, some of which also affect the motor system