单项选择题
A、 if the quantity in Column A is greater B、 if the quantity in Column B is greater C、 if the two quantities are equal D、 if it is impossible to determine which quantity is greater
A. none B. Ⅰ only C. Ⅲ only D. Ⅰ and Ⅲ only E. Ⅰ, Ⅱ, and Ⅲ