**Core Concept**
The patient is presenting with symptoms of a cracked tooth syndrome, a condition characterized by pain on biting or chewing, which is relieved by releasing the bite. This occurs due to a fracture in the tooth structure, often without visible signs of damage.

**Why the Correct Answer is Right**
The immediate treatment for a cracked tooth syndrome involves the application of a dental restoration or a crown to the affected tooth to alleviate the pain and prevent further damage. The restoration helps to distribute the forces of biting and chewing more evenly, reducing the stress on the cracked tooth. In some cases, a temporary restoration may be placed to relieve the pain until a more definitive treatment can be planned. The goal is to prevent the crack from propagating and causing more severe damage to the tooth.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because a cracked tooth generally does not require a root canal treatment as the pulp is not directly involved in the fracture.
* **Option B:** This option is incorrect because antibiotics are not indicated in the treatment of a cracked tooth syndrome, as the condition is not caused by an infection.

**Clinical Pearl / High-Yield Fact**
Cracked tooth syndrome is often associated with teeth that have undergone a significant change in occlusal loading, such as a change in the bite or a new dental restoration.

**Correct Answer:** C.