Task: Question Answering
Input (English): Question: A runner runs the 40 miles from Marathon to Athens at a constant speed. Halfway through the run she injures her foot, and continues to run at half her previous speed. If the second half takes her 8 hours longer than the first half, how many hours did it take the runner to run the second half?

 Option A: 10

 Option B: 12

 Option C: 16

 Option D: 20

 Option E: 24
Output (English): Option C