Which of the following taxpayers (all age 40) are required to file a return? 
Definitions:
Classical Conditioning
A training technique involving the repetitive pairing of two stimuli; a reaction initially caused by the second stimulus is ultimately provoked by just the first stimulus.
Dissociative Disorders
A group of mental disorders characterized by a voluntary disconnection and lack of continuity between thoughts, memories, surroundings, actions, and identity.
Consciousness
the state of awareness of one's own existence, sensations, thoughts, surroundings, and experiences.
Schizophrenia
A mental disorder characterized by disturbances in thought, perception, and behavior, leading to a disconnect from reality.
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