Task: Question Answering
Input (English): Question: Subtract. Simplify your answer and write it as a proper fraction or as a whole or mixed number.
4/5 - 1/5=

 Option A: 1/5

 Option B: 2/5

 Option C: 3/5

 Option D: 4/5

 Option E: 5/5
Output (English): Option C