**Core Concept**
Candida albicans is a commensal yeast that can cause opportunistic infections in humans, particularly in immunocompromised individuals. It is a polymorphic fungus that can switch between yeast and hyphal forms, allowing it to adhere to host tissues and evade the immune system.

**Why the Correct Answer is Right**
Candida albicans is a well-known opportunistic pathogen that can cause a range of infections, from superficial skin and mucosal infections to life-threatening systemic infections. One of its key virulence factors is its ability to form biofilms, which are complex communities of microorganisms that adhere to surfaces and are resistant to antifungal therapy. Candida albicans also produces enzymes such as secreted aspartic proteinase (Sap) that help it to degrade host proteins and evade the immune system.

**Why Each Wrong Option is Incorrect**
**Option A:** Not a correct statement, but we need the options to determine why it's incorrect. Please provide the options.

**Clinical Pearl / High-Yield Fact**
Candida albicans is often found in the oral and gastrointestinal tracts of healthy individuals, but can cause opportunistic infections in people with compromised immune systems, such as those with HIV/AIDS, undergoing chemotherapy, or taking immunosuppressive medications.

**Correct Answer:** (insert correct option letter here)