**Core Concept**
Open reduction internal fixation (ORIF) is a surgical technique used to restore the anatomical alignment of a fractured bone by making an incision, exposing the bone, and then using internal fixation devices such as plates, screws, or rods to hold the bone fragments in place. This method is particularly useful in pediatric patients with complex fractures where closed reduction methods may be inadequate.

**Why the Correct Answer is Right**
In pediatric patients, ORIF is often required for fractures with significant displacement or angulation, especially in the presence of a growth plate. The growth plate, also known as the epiphyseal plate, is a layer of cartilage in the bone where new bone growth occurs. Displaced fractures in this area can disrupt growth, leading to growth disturbances or limb length discrepancies. ORIF helps to restore the normal anatomical alignment, allowing for proper growth and development of the bone. Additionally, ORIF can provide stability to the fracture site, reducing the risk of further complications such as nonunion or malunion.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because closed reduction methods, such as manipulation and casting, are often sufficient for pediatric fractures with minimal displacement.
**Option B:** This option is incorrect because nonoperative management, including immobilization and observation, may be sufficient for pediatric fractures with minimal displacement.
**Option C:** This option is incorrect because external fixation, which involves the application of an external device to stabilize the fracture, may not provide sufficient stability for pediatric fractures with significant displacement.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that pediatric fractures require a different approach than adult fractures due to the presence of growth plates. A thorough understanding of pediatric fracture management is crucial to avoid complications and ensure optimal outcomes.

**Correct Answer:** A.