[求助]gwd-3-math33

Q33:

              150, 200, 250, n

Which of the following could be the median of the 4 integers listed above?

I.                    175

II.                 215

III.               235

A.    I only

B.    II only

C.    I and II only

D.    II and III only

                                   E.    I, II, and III

答案是c，我实在想不通

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