I have to speak to my grandpa loudly because something is wrong with his .
A:eyes
B:ears
C:hands
D:legs
某班同学去春游花了250元包租了一辆客车,如果参加春游的同学每人交8元钱租车费,还不够,如果每人交9元,还用不了.用不等式表示出上述问题中存在的不等关系.