Sorry the correct answer was B.

In the 1700s, which Rhone Cru began branding their wines with "C.d.R." on their barrels to protect against fraud and to certify their contents?

B. Lirac

Lirac wine in the 16th Century was exported to Paris, Holland, and England. In 1737, a kingly order demanded that casks of Lirac wine shipped from the river port of Roquemaure needed to be branded with the letters C.d.R. (representing "Cotes du Rhone"), an early form of guaranteeing the origin of the wine from the region.

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