Schools ( )allow students at least one hour a day for in bad A;would B might C should D could

问题描述:

Schools ( )allow students at least one hour a day for in bad A;would B might C should D could
请讲出原因
thank you

A;would(愿意) B might(可能) C should(应该) D could(可以)
从整个句子的含义上看,应该选C
学校应该允许学生每天至少一个小时的休息时间.