【正确答案】 B

【答案解析】[听力原文]
   On this graduation ceremony I'd like to offer my sincere congratulations to you all. Well done, everyone. I've got three tips to share with you, hoping to make a direction for the future life after your graduation from college.
   Tip one: There are few things that get you over your own crop more than working hard. Do you want to know how to work hard? It's not difficult. All you have to do is to listen. Listen to what's going on around you. Learn how the project you are working on fits in the big picture. Learn how you fit in. When you truly understand how the big picture works, you start being able to expect changes and change your behavior.
   Tip two: Be kind to everyone. I can't stress this enough, but it remains tree. Kindness will pay back invaluable rewards. Don't you believe me? I'm sure that at some point you'll have the opportunity to work for someone who used to be your assistant, or hire someone who used to be your boss.
   Tip three: Stay interested. Is there anything you can't stop thinking about? Keep doing it. Interest is an indispensable part of success. You will be great at the things that you are willing to do.
   Remember that you have time to figure out what you want to do. You have time to try again. Just have courage to do it so long as you're willing to work hard.
   Whom is the speech aimed at?