Hay una persona en el asiento. está a. reservado c. ocupado b. libre d. all of the above

The answer is ocupado or occupied.

In English,
When there is already sitting on the seat by the person it means the seat is already occupied and can no longer be reserved or sitting and it means you can try to seek another seat that is free and available except for the reserved because when the seat has a note “reserved” it means someone is pre-occupying.

In Spanish,
La respuesta es Ocupado. Cuando la persona ya está sentada en el asiento, significa que el asiento ya está ocupado y ya no se puede reservar ni se puede sentar, lo que significa que puede intentar buscar otro asiento libre y disponible, excepto el reservado, porque cuando el asiento tiene una nota "reservada" significa que alguien está ocupando previamente.

Idon't think any of em are right, you need to add the number of what paragraph you got your citation from

The feudalism i believe