请选择ABCD4u(t,k-[ His daughter is _________ girl.6M;i/v6t7|.x(?9l1T8I
A. a 8-year-old6M;i/v6t7|.x(?9l1T8I
B. an 8-year-old6M;i/v6t7|.x(?9l1T8I
C. an 8-years-old6M;i/v6t7|.x(?9l1T8I
D. a 8 years old6M;i/v6t7|.x(?9l1T8I