Bert's Bagels Inc. and other bakeries refer to a "baker's dozen" as consisting of a collection of thirteen baked goods. According to the UCC, this is

Name: Bert's Bagels Inc. and other bakeries refer to a "baker's dozen" as consisting of a collection of thirteen baked goods. According to the UCC, this is
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The term "baker's dozen" is a common usage of trade in the bakery industry to refer to a collection of 13 baked goods instead of the usual 12. Therefore, the correct answer is D, a usage of trade.