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 the relationship cannot be determined from the information given.
A. 200 B. 400 C. 800 D. 1,000 E. 4,000
A. 9 B. 18 C. 40 D. 80 E. 90