**Core Concept**
Apical root fracture in an anterior tooth is a dental emergency that requires prompt treatment to prevent further complications. The treatment involves addressing the fracture, managing pain, and restoring the tooth's function.

**Why the Correct Answer is Right**
Treatment of apical root fracture involves a combination of endodontic therapy and splinting. **Endodontic treatment** (option C) is necessary to remove the pulp tissue, clean and shape the canal, and fill the root canal system to prevent infection and promote healing. **Splinting** (option B) for 2-3 months is essential to stabilize the tooth, minimize tooth movement, and allow the fracture site to heal. **Extraction** (option A) would be an unnecessary and premature step, as it would result in tooth loss. In some cases, extraction might be the only viable option if the fracture is severe or if there are other complicating factors. However, in the context of this question, all three options are correct because they are all part of a comprehensive treatment plan.

**Why Each Wrong Option is Incorrect**
**Option A:** Extraction is not the primary treatment for apical root fractures, as it can lead to tooth loss and compromise the surrounding bone and adjacent teeth.

**Option B:** While splinting is a crucial part of treatment, stating that it is the only necessary step is incorrect, as endodontic treatment is also essential.

**Option C:** Endodontic treatment alone is insufficient, as splinting is necessary to stabilize the tooth and promote healing.

**Clinical Pearl / High-Yield Fact**
When managing apical root fractures, it's essential to consider the fracture's location, tooth mobility, and the patient's overall oral health. A thorough clinical examination and radiographic evaluation are necessary to determine the best course of treatment.

**✓ Correct Answer: D. All of the above**