**Core Concept**
Vibrio cholerae is a Gram-negative, facultative anaerobe that causes cholera, a diarrheal disease characterized by massive fluid loss and electrolyte imbalance. The pathogenesis of cholera involves the production of cholera toxin, which acts on the intestinal epithelial cells.

**Why the Correct Answer is Right**
The correct answer is related to the mechanism of cholera toxin action. Cholera toxin is a heat-labile, AB5 toxin that consists of two subunits, A and B. Subunit B binds to the GM1 ganglioside receptors on the surface of intestinal epithelial cells, while subunit A is activated and translocates to the cytosol, where it ADP-ribosylates the Gs alpha subunit of the adenylate cyclase complex. This results in the activation of adenylate cyclase, leading to an increase in cyclic AMP levels and subsequent secretion of chloride and bicarbonate ions into the intestinal lumen.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe the mechanism of cholera toxin action.
**Option B:** This option is incorrect because it is not related to the pathogenesis of cholera.
**Option C:** This option is incorrect because it is a false statement about the virulence factors of Vibrio cholerae.

**Clinical Pearl / High-Yield Fact**
The use of oral rehydration therapy (ORT) is a key component in the management of cholera, as it helps to replace lost fluids and electrolytes. ORT should be initiated promptly in patients with suspected or confirmed cholera.

**Correct Answer:** C.