**Core Concept**
Albert's stain is a histological staining technique used to detect the presence of acid-fast bacteria, such as Mycobacterium tuberculosis. This technique relies on the ability of acid-fast bacteria to resist decolorization by acid-alcohol.

**Why the Correct Answer is Right**
The correct answer is based on the principle of acid-fast staining, where the bacteria retain the primary stain (usually carbol fuchsin) after being treated with acid-alcohol, whereas non-acid-fast bacteria do not. This technique is crucial for the diagnosis of tuberculosis and other mycobacterial infections. Albert's stain is a specific type of acid-fast stain that uses a combination of carbol fuchsin and methylene blue to differentiate acid-fast from non-acid-fast bacteria.

**Why Each Wrong Option is Incorrect**
* **Option A:** Albert's stain is not primarily used for staining connective tissue, which is typically stained with techniques like Masson's trichrome or von Kossa.
* **Option B:** Albert's stain is not a type of Gram stain, which differentiates bacteria based on their cell wall composition.
* **Option C:** Albert's stain is not typically used for staining fungi, which are usually stained with techniques like methenamine silver or periodic acid-Schiff (PAS).

**Clinical Pearl / High-Yield Fact**
It's essential to remember that the acid-fast stain is a crucial diagnostic tool for tuberculosis and other mycobacterial infections, and Albert's stain is a specific type of acid-fast stain that is widely used in clinical microbiology laboratories.

**Correct Answer:** C.