What SQL command will allow you to change the table STUDENT to add the constraint named Grade Check that states that the values of the Grade column must be greater than 0?
ALTER TABLE STUDENT ALTER CONSTRAINT Grade Check (Grade > 0);
ALTER TABLE STUDENT ADD CONSTRAINT Grade Check (Grade > ‘O);
ALTER TABLE STUDENT ADD CONSTRAINT Grade Check CHECK (Grade> O);
ALTER TABLE STUDENT ADD CONSTRAINT Grade Check (Grade> O);