数学jj答案不对！

557. If N is a common multiple of 75, 98, and 140, which of the following must be true?

I. N is divisible by 9

II. N is divisible by 49

III. N is greater than 14000

讨论：III

75=3*5*5，98=2*7*7，140=2*2*5*7

N至少为2*2*3*5*5*7*7=14700

我觉得， BC应该都可以！