A、The art of saying thank you. B、The secret of staying pretty. C、The importance of good manners. D、The difference between elegan

Do you remember the time when people were a litter nicer and gentler with each other? I certainly do. And I feel that much of the world has somehow gotten away from that. Too often I see people rushing into elevators without giving those inside a chance out first, or never saying "Thank you" when others hold the door open for them. We get lazy. And in our laziness, we think that something, like a simple "Thank You" doesn’t really matter. But it can matter very much. The fact is that no matter how nicely we dress, or how beautifully we decorate we home, we can’t be truly elegant unless we have good manners because elegance and good mannersgo always hand in hand. In fact, I think of the good manners as a sort of hidden beauty secret. Haven’t you noticed that the kindest, most generous people seem to keep getting prettier? It’s funny how that happens. But it does. Take the long-lost art of saying "Thank you" like wearing a little makeup or making sure your hair is neat. Getting into the habit of saying "Thank you" can make you feel better about yourself. Good manners add to your image while an angry face makes the best dressed person look ugly.
Questions 11 to 13 are based on the passage you have just heard.
Q11: What is the passage mainly about?
Q12: What does the speaker say about the people of the past?
Q13: According to the speaker, how could we best improve our image?