Kinda confused lol, can you like make the sentences a little more less confusing
1. Resultó un completo fracaso.
2. ... ya que no teníamos nada planeado para el día.
3. Desafortunadamente.
4. Desacelerado.
5. De todos modos estábamos cansados.
6. Yo no creo que...
The correct answer is aquella, because we would use the word if there was a difference in the distance. Like if you were in the right corner of a room, and the guitar was at the left corner of the room. And another reason is because aquella is feminine and in spanish, guitar is feminine.