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);