Which of the following most likely functions as the rising action in a story?

I couldn't remember why I had come into the room in the first place.
It would be a long but lovely night, with stars twinkling both in the heavens and on the water below us.
Then, as if the world were out to get us, the knot connecting us to the dock mysteriously untied itself.
What if we had found the necklace before the ship had sailed?



*Rising Action: What LEADS up to the climax