**Core Concept**
An open reduction and internal fixation (ORIF) is a surgical procedure used to realign and stabilize bone fragments in cases of fractures. In children, the decision to perform an ORIF depends on the type, location, and displacement of the fracture, as well as the child's age and overall health.

**Why the Correct Answer is Right**
The correct answer is a child with a **displaced femoral neck fracture**. This type of fracture occurs in the proximal femur, near the hip joint, and can cause significant morbidity if not treated promptly and properly. In children, a displaced femoral neck fracture requires an ORIF to restore the normal anatomy and prevent complications such as avascular necrosis of the femoral head. The surgery involves open reduction to align the bone fragments and internal fixation using screws or plates to stabilize the femur.

**Why Each Wrong Option is Incorrect**
**Option A:** A child with a **nondisplaced femoral neck fracture** may not require an ORIF, as the bone fragments are still in alignment and may be managed with closed reduction and immobilization in a cast or sling.

**Option B:** A child with a **fracture of the distal radius** (wrist fracture) may not require an ORIF, as these fractures are often managed with closed reduction and immobilization in a cast.

**Option C:** A child with a **torn meniscus** in the knee may require arthroscopic surgery or other treatments, but not an ORIF, as the meniscus is a cartilage structure rather than bone.

**Clinical Pearl / High-Yield Fact**
In children, the decision to perform an ORIF should be based on the type and severity of the fracture, as well as the child's overall health and developmental stage. It's essential to consider the growth plates and potential for growth disturbances when planning surgical treatment.

**Correct Answer:** C.