Jill, a new employee of CFK fast-food chain, was refilling the deep fat fryer, some excess cooking oil spilled onto the floor, and she wasn’t able to clean it. Later that morning, Kim, the fry cook, fell due to the slippery floor. After the fall, the cook was still in severe pain and was unable to return to work.

Question :
1. Explain briefly why did this accident happen?

2.How can you prevent future falls like this one?​