要修改数据表tb_student的存储引擎为InnoDB，可以使用下面的（         ）语句 A.
ALTER TABLE tb_student DEFAULT CHARSET=InnoDB; B.
ALTER TABLE tb_student ENGINE=InnoDB;
C.
ALTER TABLE tb_student AUTO_INCREMENT=InnoDB; D.
Alter TABLE tb_student ADD CONSTRAINT mrprimary PRIMARY KEY (id)