The last option is correct. Fui al mall y compré un vestido azul.
Explanation: It was 8pm. My sister’s birthday was next day and I needed to buy a gift for her, so I went to the mall and I bought a blue dress (fui al mall y compre un vestido azul).
D. vendré
¿A qué hora vendré usted a mi casa?
It’s carpeta, in English this means like a folder or organizer