Question

Every time a project deadline approached, Robert became agitated, angry, and suffered from frequent headaches. His manager concluded that he was suffering from .

Answer 1

I think Stress or anxiety

Answer 2

The answer is stress.

Stress is your body's way of responding to any kind of demand or threat. When you sense danger—whether it's real or imagined—the body's defenses kick into high gear in a rapid, automatic process known as the “fight-or-flight” reaction or the "stress response." The stress response is the body's way of protecting you. (helpguide.com)