若要将“s_c_info”表中所有学生的成绩“score”加5分，则正确的SQL语句是（）

AUPDATE s_c_info SET score=5

BUPDATE s_c_info SET score＝score+5

CUPDATE FROM s_c_info SET score=5

DUPDATE FROM s_c_info SET score=score+5