## Core Concept
Candida is a genus of yeast that is commonly found on the skin and mucous membranes of humans. It is an opportunistic pathogen that can cause infections in individuals with compromised immune systems. Candida species are known for their ability to form biofilms and exhibit resistance to various antifungal agents.

## Why the Correct Answer is Right
The correct answer, ., implies that one of the statements provided about Candida is false. To determine which statement is incorrect, we need to evaluate each option. However, since the specific details of options A, B, C, and D are not provided, we will proceed with a general understanding of Candida.

## Why Each Wrong Option is Incorrect
Without specific details on options A, B, C, and D, we can still discuss common misconceptions about Candida:
- **Option A:** If a statement claims that Candida is a bacterium, it would be incorrect because Candida is a type of fungus, specifically a yeast.
- **Option B:** If a statement suggests that Candida infections are always symptomatic, it would be incorrect because some individuals can be colonized by Candida without showing any symptoms.
- **Option C:** If a statement asserts that Candida species are susceptible to all antifungal agents, it would be incorrect because some Candida species can exhibit resistance to certain antifungal drugs.
- **Option D:** If a statement says that Candida infections only occur in immunocompromised individuals, it would be incorrect because while immunocompromised individuals are at higher risk, Candida infections can also occur in people with normal immune systems, especially in cases of disrupted mucosal or skin barriers.

## Clinical Pearl / High-Yield Fact
A key point to remember is that **Candida albicans** is the most common species causing human infections, but other species like **Candida auris**, **Candida glabrata**, and **Candida krusei** are also significant due to their resistance patterns. A classic clinical correlation is that patients with diabetes, especially those with poorly controlled blood sugar levels, are more susceptible to Candida infections.

## Correct Answer Line
**Correct Answer: D.**