Three students in ten will go hiking and___to go raftinga,the rest are b.the rest is c.the other are d.the other is c对吗为什么

Three students in ten will go hiking and___to go raftinga,the rest are b.the rest is c.the other are d.the other is c对吗为什么
Three students in ten will go hiking and___to go rafting
a,the rest are b.the rest is c.the other are d.the other is
c对吗为什么

Three students in ten will go hiking and___to go raftinga,the rest are b.the rest is c.the other are d.the other is c对吗为什么
选择A
B 的is 应该换成are,这里的rest明显应该是复数
C other没加s,应该是复数
D is应该是are,理由同上
全句的意思是：10个学生中的3个将去远足,而“其余的/剩下的”将去划皮艇
剩下的是7个,所以肯定应该用复数
而the other 只能表示：另一个
我不知道楼上的C都是怎么选出来的?