B because you need the past tense of tú
It would be to maintain their language and culture, because they're the type of people who TREASURES their culture, and don't like to change just to fit in.
I hope I helped! =D
1. I'm 14 years old. And Maria?
2. You're 12 years old. And the boys?
3. Mom is 40 years old. And dad?
4. You're 15 years old. And our friend?
