Context: I had the most vivid dream last night . I was sitting on the ledge of my balcony , looking over the city below , when my apartment gave a tremendous shudder and detached itself from the ground . I floated over Codice , looking down and seeing the people flowing through the streets , like ants . I fell from the balcony .

Question: How could I tell it was a dream ?
Options:
0. Buildings do not simply detach themselves from the ground .
1. I knew it was a dream because I was looking down on people .
2. I knew it was a dream when I woke up and realized it .
3. None of the above choices .
Answer: 0