Write a question about the following article.

I plan to try again soon . These are mission figs and brown turkey figs . The night before last I got up to let the cat out . I lost my balance and fell , hitting my knee hard on the ceramic tile .

Question:
Why is the narrator 's knee all bruised up ?
Choose from: a. They got bit by the cat .. b. They got hit by a car .. c. They lost their balance .. d. None of the above choices ..