Psychological disorders among the elderly can be divided into two groups:

A) personal losses and mental stress.
B) the process of aging and disorders of cognition.
C) environmental factors and genetic factors.
D) physical problems and sensory problems.

The process of aging and disorders of cognition are two primary categories into which psychological disorders among the elderly can be divided. The process of aging can lead to changes in mental health due to physiological changes in the brain and body, while disorders of cognition specifically refer to issues with memory, thinking, problem-solving, and other cognitive functions, which are common in conditions like Alzheimer's disease and other forms of dementia.