The matter __________ your fate can't be taken for granted. You have to think it over seriously.

A．relates to

B．related to

C．relate to

D．to relate to

六一儿童节，学生们乘坐一辆旅游车去二龙山游玩．汽车上山的速度为每小时27千米，平路上的速度是上山速度的3倍，汽车在平面路段和上山路段各行了3小时，最后到达了山顶．问整个路程有多长？