定义在R上的函数f（x）满足：f（x﹣1）=f（x+1）=f（1﹣x）成立，且f（x）在﹣1，0上单调递增，设a=f（3），b=f（$\sqrt{2}$），c=f（2），则a，b，c的大小关系是（　　）

根据短文理解，回答问题

    Many students in the USA always take the school bus to school every day. Parents think taking the school bus is very safe. But sometimes it is also dangerous (危险的). Some students die (死亡) because they don't follow the school bus rules. Here are some school bus rules:

◆Arrive at the bus station early.

◆Wait for the bus at the bus station.

◆Don't play around (在周围) the bus.

◆Don't run everywhere at the bus station.

◆Don't walk or run in the bus when it is going.

◆Don't try to leave the bus before it stops.

These rules are good for students. Remember them and follow them. So you can keep yourself safe.

①他将小球用一根细线悬挂起来,如图(a)所示,剪断细线后小球落下,如图(b)所示。

②他又将小球用两根细线悬挂起来,如图(c)所示,剪断其中的一根细线,小球发生摆动,如图(d)所示。通过实验,他的疑问得到解决根据实验现象及相关条件,小明同学归纳得出的初步结论:(选填下面对应的结论字母)