查询出EMP表中1982年及以后入职的员工信息（）（注：字段hiredate为入职日期，数据类型为DATE型）

• A、select * from emp where hiredate>='19820101';
• B、select * from emp where hiredate>=to_char('19820101','YYYYMMDD');
• C、select * from emp where to_date(hiredate,'YYYYMMDD')>='19820101';
• D、select * from emp where to_char(hiredate,'YYYYMMDD')>='19820101';