What is unique about the Veggie Mexican Pizza compared to the regular Mexican Pizza?

The Veggie Mexican Pizza is indeed unique because it uses black beans instead of beef. This substitution is significant as it offers a plant-based protein option, catering to vegetarians and those seeking alternative protein sources. The use of black beans not only changes the protein content but also adds different flavors and textures compared to the traditional Mexican Pizza, which is made with seasoned beef. This change enhances the overall appeal of the Veggie version for those looking for meatless options while maintaining the classic elements of Taco Bell's flavor profile.

The other options, while they might seem plausible, do not accurately represent the distinguishing features of the Veggie Mexican Pizza. For instance, while the presence of cheese or calorie count may vary by selection, they are not defining characteristics that differentiate the veggie version. Similarly, the absence of beans is incorrect, as the Veggie Mexican Pizza specifically replaces beef with black beans rather than eliminating beans altogether.