If the midpoint of AC is on the x-axis and the midpoint of BC is on the y-axis, then the coordinate of C is () A. （2，-7）B. （-7，2）C. （-3，-5）D. （-5，-3）

Let the midpoint of vertex C (x, y), ∵ AC be on the x-axis, the midpoint of BC be on the y-axis, ∵ 7 + y2 = 0, y = - 7, − 2 + x2 = 0, x = 2, ∵ C coordinate be (2, - 7), so select & nbsp; a

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