Task: Question Answering
Input (English): Question: Rahul rented a power tool from a rental shop. The rent for the tool was $40 for the first hour and $20 for each additional hour. If Rahul paid a total of $160, excluding sales tax, to rent the tool, for how many hours did she rent it?

 Option A: 1

 Option B: 4

 Option C: 9

 Option D: 7

 Option E: 3
Output (English): Option D