The translation you are looking for is:
"The rental apartment is located on the ninth floor."
If you are looking for an answer instead of a translation, please comment on my answer! I'll replay ASAP if that is the case.
Answer:
Liderazgo alentador, es el que asegura que los colaboradores aumenten su confianza y habilidad para desempeñar una tarea determinada de manera adecuada e independiente. Una manera de efectuar lo anterior es reconocer sus logros y dejarlos tomar decisiones.
I believe that it would be B (reloj) since it is talking about how there is a window, a door and then a clock in a classroom.
It is also giving you the masculine singular form indicating that it can only be reloj.
