[单选题]有以下程序#include struct S{　int n;　int a[20];};void f(

A1,2,3,6,8,7,5,4,10,9,

B3,4,2,7,9,8,6,5,11,10,

C2,3,1,6,8,7,5,4,10,9,

D2,4,3,9,12,12,11,11,18,9