A company tracks the number of daily sales for three brands during a given month using the box plots of the data. One of the brands sold out on a given day and could not be restocked, resulting in the lowest single-day sales. Which brand sold out?

Brand A's sales data, represented in the box plot, do not indicate a minimum value lower than that of Brand B. Therefore, it is unlikely that Brand A sold out, as it would need to show the lowest recorded sales to be the correct answer.

Although Brand C may have had low sales, the box plot does not reflect it as the brand that sold out on the specific day in question. The minimum sales value must be the lowest for the brand that experienced a complete sellout, which is not indicated for Brand C.

While it is conceivable that multiple brands could experience low sales, only one brand can be identified as having sold out on the specific day noted in the question. Thus, the idea that all three brands sold out is incorrect since the data identifies Brand B as the one with the lowest sales.