【单选题】What is the main topic of the news story
A.The coffee market in Boston.
B.The role of supermarkets in the coffee business.
C.A new trend in the United States.
D.The advertising of a new product.
【单选题】What is the main topic of the news story
A.The coffee market in Boston.
B.The role of supermarkets in the coffee business.
C.A new trend in the United States.
D.The advertising of a new product.
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