Since it’s in imperfect tense, it goes like this:
1. Yo trabajaba
2. Tú aprendías
3. Él tenía
4. Ellos escribían
5. Nosotros podíamos
The original sentences are wrong because this exercise helps you to reach how to conjugate verbs in a perfect way.
Answer: B
Explanation: Sea is the past tense, meaning "I used to be from argentina," which isn't correct because where you come from can't change.
