**Core Concept:** Multiple non-fixed, soft swellings over the body associated with a positive family history suggest a potential autoimmune disorder or genetic disorder. Both can lead to abnormal immune response or protein misfolding, respectively.

**Why the Correct Answer is Right:** In this scenario, the correct answer (D) represents a genetic disorder leading to autoimmune disease, which is **Hereditary Hemochromatosis**. This condition is characterized by excessive iron absorption from the gastrointestinal tract, leading to iron overload in various tissues. When the iron overload reaches the liver, it causes inflammation, fibrosis, and cirrhosis, which can result in multiple non-fixed, soft swellings over the body.

**Why Each Wrong Option is Incorrect:**

A. **Hodgkin Lymphoma**: This is a cancerous disease involving the lymphatic system, typically presenting as a single, firm, fixed swelling (not multiple, non-fixed swellings).
B. **Lupus Erythematosus**: This autoimmune disease involves various organs, including skin, joints, kidneys, and blood vessels, but typically presents with malar rash, photosensitivity, joint pain, and arthritis, not multiple, non-fixed swellings.
C. **B-Cell Lymphoma**: A cancerous disease affecting B-cells, which typically presents as a single, firm, fixed swelling (not multiple, non-fixed swellings).
D. **Hereditary Hemochromatosis**: This genetic disorder leads to autoimmune diseases (as explained above).
E. **Hypothyroidism**: Hypothyroidism is characterized by fatigue, weight gain, dry skin, cold intolerance, and constipation, not multiple, non-fixed swellings.

**Clinical Pearl / High-Yield Fact:** Hereditary hemochromatosis is a genetic disorder that can lead to autoimmune diseases, as explained above. These disorders can manifest with various clinical features depending on the specific organ or system affected. In the context of this question, hereditary hemochromatosis is the correct answer, as it explains the association between a genetic disorder and autoimmune disease leading to multiple, non-fixed swellings over the body.