In which stage of the general adaptation syndrome has the body reached the limits of its ability to adapt to stress, which may result in the development of stress-related diseases?

A) alarm
B) collapse
C) exhaustion
D) resistance

The exhaustion stage is characterized by a depletion of the body's resources to cope with stress, resulting in the development of stress-related diseases. The alarm stage is the body's initial response to stress, while resistance occurs when the body has adapted to the stressor and is attempting to cope. Collapse is not a recognized stage in the general adaptation syndrome.