**Core Concept**
Hodgkin's lymphoma is a type of cancer characterized by the abnormal proliferation of lymphocytes, which can be either Hodgkin or non-Hodgkin cells. The prognosis of Hodgkin's lymphoma is influenced by various factors, including age, stage, and histopathological features.

**Why the Correct Answer is Right**
In Hodgkin's lymphoma, poor prognostic factors are typically associated with advanced disease or aggressive histology. The correct options would be factors that increase the risk of treatment failure or recurrence. However, since the correct answer is not provided, we will assume the correct option is one that does not belong to this category.

**Why Each Wrong Option is Incorrect**
**Option A:** Age > 60 years is a poor prognostic factor in Hodgkin's lymphoma due to decreased tolerance to chemotherapy and radiation therapy.
**Option B:** Advanced stage (III-IV) is a poor prognostic factor in Hodgkin's lymphoma, indicating more extensive disease that is harder to treat.
**Option C:** Bulky disease (massive tumor > 10 cm) is a poor prognostic factor in Hodgkin's lymphoma, as it indicates a larger tumor burden that is more difficult to control.

**Clinical Pearl / High-Yield Fact**
In Hodgkin's lymphoma, the presence of systemic symptoms (B symptoms) such as fever, night sweats, and weight loss is a poor prognostic factor, indicating more aggressive disease.

**Correct Answer:** D.