**Core Concept**
Schizophrenia is a complex psychiatric disorder characterized by a wide range of symptoms, including positive symptoms (e.g., hallucinations, delusions) and negative symptoms (e.g., apathy, social withdrawal). The prognosis of schizophrenia can be influenced by various factors, including symptom profile, age of onset, and presence of comorbid conditions.

**Why the Correct Answer is Right**
Affective symptoms, which are mood-related symptoms such as depression or mania, are often associated with a better prognosis in schizophrenia. This is because affective symptoms tend to be more responsive to treatment, particularly with antipsychotic medications and mood stabilizers. In contrast, patients with predominantly negative symptoms or cognitive impairment tend to have a poorer prognosis. The presence of affective symptoms may also indicate a more favorable response to psychosocial interventions, such as cognitive-behavioral therapy.

**Why Each Wrong Option is Incorrect**
**Option A:** Soft neurological signs, such as minor motor abnormalities or cognitive impairments, are often associated with a poorer prognosis in schizophrenia. These signs may indicate underlying neurodevelopmental or neurodegenerative processes that contribute to the disorder's chronicity.

**Option C:** Emotional blunting, a type of negative symptom, is characterized by a reduction in emotional expression and responsiveness. This symptom is often associated with a poorer prognosis, as it can be difficult to treat and may contribute to social isolation and poor functional outcomes.

**Option D:** Insidious onset, which refers to a gradual development of symptoms, is often associated with a poorer prognosis in schizophrenia. This type of onset may indicate a more chronic and treatment-resistant course of the disorder.

**Clinical Pearl / High-Yield Fact**
When assessing the prognosis of schizophrenia, it is essential to consider the presence and severity of both positive and negative symptoms. Affective symptoms, particularly depressive symptoms, may be a useful prognostic indicator, as they can be more responsive to treatment and may indicate a more favorable response to psychosocial interventions.

**Correct Answer:** **✓ Correct Answer: B. Affective symptoms**