The Available Data from Patients with Brain Damage to Circuits

The available data from patients with brain damage to circuits controlling attention indicate that:

A) the brain mechanisms controlling attention are inseparable from the brain mechanisms directly involved in perception
B) multiple brain mechanisms are responsible for the control of attention
C) a single mechanism governs the ability to disengage attention from its current focus and also the ability to lock in to a new attention focus
D) the mechanisms controlling attention differ from one individual to the next