有如下存储过程:DELIMITER //CREATE PROCEDURE CountProc1(IN s_gender VARCHAR(50),OUT num INT)BEGINSELECT COUNT(*) INTO num FROM student WHERE gender = s_gender;END //DELIMITER ;下面选项中,能对上述存储过程实现正确调用的是( )
A.
CALL CountProc1(in " 女",out @num);
B.
SELECT CountProc1(" 女",@num);
C.
DECLARE CountProc1(" 女",out @num);
D.
CALL CountProc1(" 女",@num);