Answer: i believe it is the 3rd one
Explanation: nos is meaning we so its the 3rd one
A usted because its formal.
Answer: la habitación individual.
Claudia viajaba sola. Prefirió <em><u>la habitación individual</u></em> en el hotel, con solo una cama.
Translation:
Claudia was traveling alone. She preferred <em><u>the single room</u></em> in the hotel, with only one bed.
<h2><em>Spymore</em></h2>