Not only Tom but also Jim ______ the Great Wall twice. [ ]

A. has been to

B. has gone to

C. have been to

以下程序运行后的输出结果是 【8】 。
#include ＜stdio, h＞
main( )
int a = 1,b =2,c =3;
if( c = a) printf( "% d \n" ,c);
else printf( "% d \n" ,b);