Music should be taught routinely in schools because of the benefits ______ can
have on the development of the brains of young children.
选D比较恰当.benefits 后面的句子can前缺主语,have后缺宾语,根据have可以知道如果选that/which的话,that/which代替benefits充当了can have的主语,那是不对的.综合起来选择one.完整结构:
Music should be taught routinely in schools because of the benefits (that/which) one can
have on the development of the brains of young children.