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Welcome to the Weekly Wine Quiz! This week, we are diving headfirst into the geek forest, wherein we shall thoroughly place our heads into the… dirt… 

Standard disclaimer: based on feedback from ever-so-vocal-and-intelligent peeps like you, I supply the quiz question each week, but I do *not* supply the quiz answer immediately. YOU supply your best guess for the answer in the comments, and then tune back in later today in the comments section for the official answer. Got it? Good, let’s do this thang!

Putting Down Root(stock)s: The dreaded vine louse Phylloxera, which mostly impacts the roots of grape vines, attacked vineyards in California in the 1980s. Which of the following vine rootstocks was incorrectly thought to have been immune to the pest?

• A. AxR-1
• B. St. George
• C. Börner
• D. 333EM

Cheers, and good luck!