In this task, you will be given a short story. One sentence from the story is chosen. Consider the events that happen after that sentence. Is any of them directly caused by it, or is made possible by it? You should write your answer in the form " A >causes/enables> B". Try to use phrases and sentences from the story to compose your answer when possible. Do not change the main selected sentence in your answer.

Let me give you an example: story: Greg picked up his friend. They went off road trucking. The truck got stuck. Greg couldn't get it out himself. Greg got it out with his friend'.
 selected sentence: Greg picked up his friend.
The answer to this example can be: Greg picks up his friend >Causes/Enables> They go off road trucking
Here is why: The person picking up his friends makes them going off road trucking possible, so this is a correct answer.

OK. solve this:
story: Amy decided to open the curtains and let light into the house. She pulled back one of the curtains on her bedroom window. The nail holding the curtain rod fell, the curtains on the floor. Amy looked and looked, but was unable to locate the nail. Amy decided to leave the curtains down and enjoy the sun.
 selected sentence: The nail holding the curtain rod fell, the curtains on the floor.
Answer:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
The nail falls >Causes/Enables> The curtains fall on the floor