以下结构体的定义语句中,正确的是______。
A、struct student {int num; char name[10];int age;};stu;
B、struct {int num; char name[10];int age;}student; struct student stu;
C、struct student {int num; char name[10];int age;}stu;
D、struct student {int num; char name[10]; int age;}; student stu;