将student表按照gender字段进行分组查询，查询出grade字段值之和小于300的分组，依据上述要求，下面选项中，正确的SQL语句是：

题目：将student表按照gender字段进行分组查询，查询出grade字段值之和小于300的分组，依据上述要求，下面选项中，正确的SQL语句是：

A. SELECT sum (grade), gender FROM student GROUP BY gender HAVING SUM (grade) <300;

B. SELECT sum (grade), gender FROM student GROUP BY gender WHERE SUM (grade) <300;

C. SELECT sum (grade), gender FROM student WHERE SUM (grade) <300 GROUP BY gender;

D. 以上语句都不对

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