**Core Concept:** Tetanus is a neuroinvasive bacterial infection caused by Clostridium tetani spores that enter the body through clean wounds, causing an immune response leading to muscle spasms and rigidity. Incomplete immunization provides partial protection, while complete immunization protects against tetanus.

**Why the Correct Answer is Right:** In this scenario, the person has received a complete tetanus immunization 10 years ago, which has developed immunity against the toxin produced by C. tetani. Although the wound is clean and hasn't caused any lacerations, the spores can still be present in the environment and get in through the clean wound. However, the person's immune system will recognize the toxin and mount a rapid immune response, preventing the toxin from causing severe disease.

**Why Each Wrong Option is Incorrect:**

A. This option is incorrect because tetanus is a preventable disease, and the correct answer indicates that complete immunization provides immunity.

B. This option is incorrect because tetanus is a preventable disease, and the correct answer explains that complete immunization provides immunity.

C. This option is incorrect because the person has already received complete immunization, preventing tetanus toxin from causing severe disease.

D. This option is incorrect as it does not address the core concept of tetanus immunity developed through complete immunization.

**Clinical Pearl:**

In low-risk individuals with a history of complete tetanus immunization, tetanus toxin exposure might still cause mild to moderate symptoms due to the immune system's rapid response. However, in high-risk patients or those with incomplete immunization, tetanus toxin can cause severe disease. Timely wound debridement, tetanus immune globulin, and tetanus toxoid are crucial for high-risk patients.

**Correct Answer:** C. Tetanus toxoid (immunoglobulin and toxoid combination)

Tetanus toxoid provides the necessary booster dose to maintain immunity against tetanus toxin, ensuring the patient's immune system can effectively respond and prevent severe tetanus disease.