Answer:
a. the level of expressed emotion
Explanation:
In abnormal psychology, Schizophrenia is referred to as one of the serious mental illnesses that are being distinguished as an individual having illogical or incoherent thoughts, hallucinations or delusions (hearing voices or imagining things that are not physically present), bizarre speech or behavior. However, it generally arises at the "early adulthood" period of an individual's life.
Causes: Genetic factors, physical factors, environmental factors, and psychological factors, etc.
A few people might get prone to 'schizophrenia' and therefore an emotional or stressful life event is responsible for triggering a "psychotic episode".
Option A is correct in the question above.