单项选择题

W: Good morning, I am calling to inquire about your book shelves.
M: Yes , what would you like to know
W: Well, I’d like to check the size first.
M: The standard point is 3.2 meters wide, 1.8 meters tall and 30 centimeters deep.
W: Thanks. That is the dimensions I need.’ How about the colors
M: We have 4 colors, white, black, brown and grey.
W: I think brown is OK, what about the charge of the delivery
M: Well it depends on how far you are from our factory
W: We are about 5 miles from your factory.
M: I see. That is our free delivery area.

What’s the color the woman chooses()

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