Answer:
D
The answer is D becuase in the sentence it says "cuando" and cuando is a past tense and the only word that makes sense to use is Tenias which is also past tense im 100% sure im rightn
1. Juan es policía
2. Yo soy una persona feliz
3. José y Paco son Chilenos
4. Ellos no son de Perú
5. Ellos son de Uruguay