[单选题]有以下程序：#include void fun(int a[],int n){　int i,j=0,

A2,4,6,8,10,9,7,5,3,1,

B10,8,6,4,2,1,3,5,7,9,

C1,2,3,4,5,6,7,8,9,10,

D1,3,5,7,9,10,8,6,4,2,