Task: Question Answering
Input (English): Problem: a car salesman earns a base salary of $ 1000 per month plus a commission of $ 200 for each car he sells. if the car salesman earned $ 2000 in march, how many cars does he need to sell in april in order to double his march earnings ?
Options: a. 14, b. 15, c. 16, d. 17, e. 18
Output (English): b