题目内容：
Which of the following is NOT true according to the passage ?
A．To prevent children from start smoking，parents，teachers and health care workers should not smoke． B．It's easier to prevent children from starting to smoke than to persuade adults to stop smoking．
C．Many children start to smoke because they want to appear mature．
D．Some children start to smoke merely out of curiosity．
参考答案：
答案解析：