**Core Concept**
Bone infarcts are a type of avascular necrosis that occurs due to interruption of the blood supply to the bone tissue. This can be caused by various factors including vascular diseases, trauma, and certain medical conditions.

**Why the Correct Answer is Right**
The correct answer is **Sickle Cell Disease**. In sickle cell disease, the abnormal sickle-shaped red blood cells can get stuck in small blood vessels, leading to blockage of blood flow and subsequent bone infarcts. This is particularly common in the femoral head and can lead to severe pain and long-term damage.

**Why Each Wrong Option is Incorrect**
**Option A:** **Osteoporosis** is a condition characterized by decreased bone density, but it does not typically cause bone infarcts.

**Option B:** **Rheumatoid Arthritis** can cause joint damage, but it is not characteristically associated with bone infarcts.

**Option C:** **Osteomyelitis** is an infection of the bone, but it is not typically characterized by bone infarcts.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that bone infarcts can occur in various conditions, including sickle cell disease, trauma, and vascular diseases. A high index of suspicion is necessary to diagnose bone infarcts, especially in patients with a history of sickle cell disease or other underlying conditions.

**Correct Answer:** D. Sickle Cell Disease