原文：In many places,river and lake water is so polluted that it is unsafe to drink.There are many things that we can do to avoid serious water shortage.First,we must save water in our daily life.Second,we can recycle the used water.题目：Which of the following statements is true according to the passage?
选项：

A:Most of the river and lake water is polluted.
B:Saving water is one of thing that we can do in our daily life.
C:Water can’t be recycled.
D:We can do nothing to avoid serious water shortage.