**Core Concept**
Fungi with a capsule refer to a specific group of organisms characterized by the presence of a polysaccharide capsule, which is a key virulence factor and a diagnostic feature. The capsule is composed of a variety of polysaccharides, including glucans, galactans, and mannan, which are produced by the fungus and help to evade the host's immune system.

**Why the Correct Answer is Right**
The presence of a capsule is a hallmark of encapsulated fungi, which includes species such as *Cryptococcus neoformans*, *Blastomyces dermatitidis*, and *Histoplasma capsulatum*. These fungi produce a polysaccharide capsule that surrounds the cell and helps to prevent phagocytosis by host immune cells. The capsule is also a key factor in the pathogenesis of these fungi, allowing them to evade the host's immune response and establish infection.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not specify a type of fungus that possesses a capsule.
* **Option B:** This option is incorrect because it is a type of fungus that does not typically produce a capsule.
* **Option C:** This option is incorrect because it is a type of fungus that produces a different type of virulence factor, not a capsule.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that the presence of a capsule is a key diagnostic feature of certain fungi, particularly *Cryptococcus neoformans*, which can cause severe disease in immunocompromised patients. A presumptive diagnosis of cryptococcosis can be made based on the presence of a polysaccharide capsule in the cerebrospinal fluid.

**Correct Answer:** D.