Answer:
D -una
Explanation:
Regla (rule) is feminine and singular
hope this helps
Siete- uno-ocho-dos-cinco-uno-dos-nueve-cuatro-tres
The questions you have already answer are incorrect
1. Hablemos
2. Vivan
3. Visite
4. Coma
5. Duerman
6. Estudien
7. Trabajen
8. Comprendas
9. Termines
La profesora es ‘alemana’