Task: Question Answering
Input (English): Problem: if a motorist had driven 1 hour longer on a certain day and at an average rate of 5 miles per hour faster, he would have covered 50 more miles than he actually did. how many more miles would he have covered than he actually did if he had driven 2 hours longer and at an average rate of 10 miles per hour faster on that day ?
Options: a. 100, b. 120, c. 140, d. 150, e. 160
Output (English): a