**Core Concept**
The question pertains to the classification of Clostridium species based on their metabolic activities, specifically their ability to ferment sugars (saccharolytic). Clostridium species are anaerobic bacteria that can be categorized into saccharolytic and proteolytic groups based on their primary source of energy.

**Why the Correct Answer is Right**
Clostridium species that are saccharolytic, such as Clostridium perfringens and Clostridium difficile, primarily obtain energy by fermenting sugars. This is in contrast to proteolytic species, such as Clostridium tetani and Clostridium botulinum, which obtain energy by breaking down proteins.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not provided, but typically, Clostridium perfringens is a saccharolytic species.
* **Option B:** This option is not provided, but typically, Clostridium difficile is a saccharolytic species.
* **Option C:** This option is not provided, but typically, Clostridium tetani is a proteolytic species, making it a likely correct answer.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that Clostridium species can be classified into saccharolytic and proteolytic groups based on their metabolic activities, which can aid in identifying the causative agent in clinical scenarios.

**Correct Answer: C. Clostridium tetani is a proteolytic species.**