Task: Question Answering
Input (English): Question: Four people are on an elevator that stops at exactly 4 floors. What is the probability that exactly one person will push the button for each floor?

 Option A: 4!/4^4

 Option B: 4^4/4!

 Option C: 4/4!

 Option D: 4/4^4

 Option E: 1/4^4
Output (English): Option A