**Core Concept**
Louis Pasteur was a French chemist and microbiologist who made significant contributions to vaccination development. He developed vaccines for several diseases, including rabies, anthrax, and chicken cholera. This question is testing the student's knowledge of historical figures in vaccine development.

**Why the Correct Answer is Right**
Louis Pasteur developed the first successful vaccine against rabies in 1885. He used a technique called attenuation, where he weakened the virus by growing it in a laboratory and then using the weakened virus to vaccinate people. This vaccine was a groundbreaking achievement in the field of immunology and saved countless lives. The rabies vaccine is still used today and is a testament to Pasteur's innovative approach to disease prevention.

**Why Each Wrong Option is Incorrect**
**Option A:** The smallpox vaccine was developed by Edward Jenner, not Louis Pasteur. Jenner used cowpox to vaccinate people against smallpox, which is a different disease from rabies.
**Option B:** The anthrax vaccine was indeed developed by Louis Pasteur, but it is not the vaccine being asked about in this question. The question specifically asks about a vaccine developed by Pasteur, and while he did develop an anthrax vaccine, the rabies vaccine is the more famous and widely known one.
**Option D:** The chicken cholera vaccine was also developed by Louis Pasteur, but it is not the vaccine being asked about in this question.

**Clinical Pearl / High-Yield Fact**
Louis Pasteur's work on vaccination paved the way for modern vaccine development. His use of attenuation and other techniques to weaken pathogens without making them completely harmless has had a lasting impact on public health.

**Correct Answer:** C.