how many types of root beer have caffeine in them?!


Question: How many types of root beer have caffeine in them?
One of my teachers and I are having a bet. I think there is only one kind, but she thinks three. Who is right/closest? and give me the correct answer as well.

Answers:

Barq's and in Florida Bawls, adds caffeine to make an energy drink.
A&W, Dad's and Mug's is caffeine free




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