题目内容：
Which of the following statements about happiness is TRUE according to David?
A．Happiness comes from ever—going change． B．Happiness comes when you succeed in doing somethin9．
C．Happiness we als off when he finally comes back to England．
D．Happiness stays even when he comes back to England．
参考答案：【答案仅供学习，请勿对照自行用药等】
答案解析：