Final answer:
An early age at onset of schizophrenia is not associated with good outcomes, as it can negatively affect critical developmental stages and is linked to more severe symptoms.
Step-by-step explanation:
In understanding schizophrenia, certain factors are associated with better or worse outcomes for individuals diagnosed with the condition. The option that is not associated with good outcomes is C. Early age at onset. A higher premorbid functioning, a short or absent prodrome, an acute (sudden) onset of symptoms, and an absence of a family history of schizophrenia are typically associated with better prognoses in schizophrenia. Conversely, an earlier age at onset is generally linked to a worse prognosis. This trend is seen because early onset can disturb critical developmental stages and is often associated with more severe symptoms and a more chronic course of the disorder.