The answer is usan because it is talking about how they talk to their friends. They USE slang.
¿cómo estàs?
carlos replied with “good, thanks” so we can assume pedro asked him “how are you?”
It is G
it is spelt
o r i G i n a l
1. The house has sixty rooms
2. the blouse costs a thousand dollars
3. The boy takes out in five courses
4.The building has one hundred and twenty-five floors
5. The school has three thousand students
i'm a bit rusty but hope i help