定义以下结构体数组struct date{int year;int month;int day;};struct s{ struct date birthday; char name[20];} x[4]={{2008, 10, 1, "guangzhou"}, {2009, 12, 25, "Tianjin";语句 printf("%s,%d",x[0].name,x[1].birthday.year); 的输出结果为( )。
A. guangzhou,2009
B. guangzhou,2008
C. Tianjin,2008
D. Tianjin,2009