## Core Concept
Catalase-positive bacteria are those that produce the enzyme catalase, which breaks down hydrogen peroxide into water and oxygen. This test is commonly used to differentiate bacteria, particularly to distinguish between catalase-positive Staphylococcus species and catalase-negative Streptococcus species. Novobiocin resistance is a characteristic used to differentiate coagulase-negative staphylococci, particularly useful in identifying *Staphylococcus saprophyticus*, which is known to be novobiocin resistant.

## Why the Correct Answer is Right
The correct answer, *Staphylococcus saprophyticus*, is catalase-positive, which aligns with the characteristics of Staphylococcus species. This bacterium is also novobiocin-resistant, a key feature that distinguishes it from other coagulase-negative staphylococci like *Staphylococcus epidermidis*, which is typically novobiocin-sensitive. *S. saprophyticus* is a common cause of urinary tract infections, particularly in sexually active young women.

## Why Each Wrong Option is Incorrect
- **Option A:** This option is incorrect because it does not specify a known catalase-positive, novobiocin-resistant bacterium.
- **Option B:** This option is incorrect as it does not accurately represent a bacterium known for being catalase-positive and novobiocin-resistant.
- **Option D:** This option is incorrect because, like options A and B, it does not correctly identify a bacterium that matches the given characteristics.

## Clinical Pearl / High-Yield Fact
A key clinical pearl is that *Staphylococcus saprophyticus* is a significant cause of urinary tract infections (UTIs), especially in young, sexually active women. It is the second most common cause of UTIs in this demographic, after *Escherichia coli*. Remembering that *S. saprophyticus* is catalase-positive and novobiocin-resistant can aid in its identification and appropriate management.

## Correct Answer Line
**Correct Answer: C. Staphylococcus saprophyticus**