从student表中查询学生姓名、年龄和成绩，结果按照年龄降序排序，年龄相同的按照成绩升序排序，下面SQL语句正确的是（ ）？

A、select name, age, score from student order by age desc , score;;
B、select name, age, score from student order by age , score asc;;
C、select name, age, score from student order by 2 desc , 3 asc;;
D、select name, age, score from student order by 1 desc , 2 ;