Musicshouldbetaughtroutinelyinschoolsbecauseofthebenefits______can
haveonthedevelopmentofthebrainsofyoungchildren.
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canhave的主语,那是不对的.综合起来选择one.完整结构:
Musicshouldbetaughtroutinelyinschoolsbecauseofthebenefits(that/which)onecan
haveonthedevelopmentofthebrainsofyoungchildren.