**Core Concept**
Primary prevention aims to prevent diseases or injuries from occurring in the first place. It involves interventions that eliminate or reduce the risk factors associated with a particular disease or condition. In medical practice, primary prevention strategies often involve health promotion, disease screening, and risk factor modification.

**Why the Correct Answer is Right**
The correct answer is a mode of primary prevention because it targets the underlying risk factors that contribute to the development of a disease. This approach is proactive, aiming to prevent the disease from occurring in the first place. For example, vaccination is a classic example of primary prevention, as it eliminates the risk of infection by introducing a weakened or killed pathogen to the body, thereby inducing an immune response.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is a mode of secondary prevention, which involves early detection and treatment of a disease that has already begun. Secondary prevention aims to reduce the severity of the disease or its complications.
**Option B:** This option is incorrect because it is a mode of tertiary prevention, which involves treatment and management of a disease that has already occurred. Tertiary prevention aims to reduce the impact of an ongoing illness or injury that has lasting effects.
**Option C:** This option is incorrect because it is a mode of quaternary prevention, which involves the alleviation of unnecessary or excessive treatment and interventions. Quaternary prevention aims to reduce the harm caused by unnecessary medical interventions.

**Clinical Pearl / High-Yield Fact**
One key takeaway is that primary prevention strategies are often more cost-effective and efficient in the long run compared to secondary and tertiary prevention approaches. By targeting risk factors and promoting healthy behaviors, healthcare providers can reduce the burden of disease and improve patient outcomes.

**Correct Answer:** C.