辨认主题句:阅读下列短文,在给出的4个选项中选出该短文最恰当的主题句
This is a prediction I can make with absolute certainty. As human beings, we are constantly in the state of change. Our bodies change every day. Our attitudes are constantly evolving. Something we swore by five years ago is now almost impossible for us to imagine ourselves believing. The clothes we wore a few years ago now look strange to us in old photographs...