What type of labeling indicates a wine is produced from grapes exclusively grown in a specific region in Canada?

The correct identification of "VQA" stands for "Vintners Quality Alliance," which is a designation in Canada that indicates wines are produced from grapes that are exclusively grown in a specific region. This labeling is crucial as it assures the consumer of both the geographical authenticity and quality standards upheld by the wine producers. VQA ensures that the wine labeled as such adheres to stringent regulations regarding the use of locally grown grapes, and it also encompasses quality control measures that promote higher standards in winemaking.

In the context of the other options, "AOC" stands for "Appellation d'Origine Contrôlée," which is a similar designation used in France and does not pertain to Canadian wine. "PDO" refers to "Protected Designation of Origin," primarily used in Europe to denote specific regions but does not specifically align with Canadian labeling practices. "DOC," or "Denominazione di Origine Controllata," is an Italian designation that also indicates quality and origin but is not applicable to Canadian wines. Thus, the distinctiveness of VQA as a Canadian wine classification makes it the correct choice for the question.