A、Their misconception about the power of time. B、Their ignorance about the rate of change in life. C、Their fantasy that the yout

M: At every stage of our lives we make decisions that will profoundly influence the lives of the people we’re going to become, and then when we become those people, [16] we’re not always thrilled with the decisions we made.
W: So young people pay good money to get tattoos removed that teenagers paid good money to get. Middie-aged people rushed to divorce people who young adults rushed to marry. Older adults work hard to lose what middle-aged adults worked hard to gain. On and on and on. The question is, why do we make decisions that our future selves so often regret?
M: [17]I think one of the reasons—I’ll try to convince you today—is that we have a fundamental misconception about the power of time. Every one of you knows that the rate of change slows over the human lifespan, that your children seem to change by the minute but your parents seem to change by the year.
W: But what is the name of this magical point in life where change suddenly goes from a gallop to a crawl? Is it teenage years? Is it middle age? Is it old age?
M: The answer, it turns out, for most people, is now, wherever now happens to be. What I want to convince you today is that all of us are walking around with an illusion, an illusion that history, our personal history, has just come to an end, that we have just recently become the people that we were always meant to be and will be for the rest of our lives. Let me give you some data to back up that claim. So [18]here’s a study of change in people’s personal values over time. Here are three values-pleasure, success and honesty. Everybody here holds all of them, but you probably know that as you grow, as you age, the balance of these values shifts.
W: So how does it do so?
M: Well, we asked thousands of people. We asked half of them to predict for us how much their values would change in the next 10 years, and the others to tell us how much their values had changed in the last 10 years. And this enabled us to do a really interesting kind of analysis, because it allowed us to compare the predictions of people, say, 18 years old, to the reports of people who were 28, and to do that kind of analysis throughout the lifespan.
16. How do we feel about the decisions made at every stage of our lives?
17. What accounts for people’s regret about their decisions according to the man?
18. What do we learn about the three values mentioned by the man?