Task: Question Answering
Input (English): Question: You collect pens. Suppose you start out with 5. Mike gives you another 20 pens. Since her father makes pens, Cindy decides to double your pens. Since you're nice, you give Sharon 19 pens. How many pens do you have at the end?

 Option A: 39

 Option B: 40

 Option C: 31

 Option D: 42

 Option E: 43
Output (English): Option C