I also want to study abroad, but it's not really that easy when you need to have enough to pay for your expenses (food, clothing, school supplies) and a student visa. It takes a lot of process, but if you really want to, then study hard because your GPA and scores depends on whether you can go or not. Go for it if that's what you want! :)
Studying abroad is an opportunity to learn about culture, adventure and it can help greatly benefit for your future. But, not everyone does that though but it's going to be great. I hope I helped and good luck!
I would definitely say B.) A smile because if you were just staring it may be rude or distracting to the speaker and a smile shows you are listening and absorbing the knowledge
