單項選擇題宏定義為“#definediv(x,y)x/y;”,若語句“printf("div(x,y)=%d\n",div(x+3,y-3));”作宏替換后為()。

A.printf("x/y=%d\n",(x+3)/(y-3));
B.printf("x/y=%d\n",x+3/y-3);
C.printf("div(x,y)=%d\n",x+3/y-3;);
D.printf("x/y=%d\n",x+3/y-3;);


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