单项选择题

要想在过程Proc调用后返回形参x和y的变化结果,下列定义语句中正确的是()。

A.Sub Proc(x as Integer, y as Intege
B.Sub Proc(By Val x as Integer, y as Intege
C.Sub Proc(x as Integer, By Val y as Intege
D.Sub Proc(By Val x as Integer, By Val y as Intege

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