Read the following context and answer the question.
Context: I ' ve got it ! I am lifting it , lifting it , almost putting it on the island , almost there , and ... . The cardboard bends AGAIN and now the entire thing falls to the floor AGAIN , but this time from a higher point in the air , so the velocity of the fall smashes it completely .
Question: Why did the structure collapse ?
Answer:


None of the above choices .