Task: Question Answering
Input (English): Problem: a trader bought a car at 20 % discount on its original price . he sold it at a 60 % increase on the price he bought it . what percent of profit did he make on the original price ? 
Options: a ) 28 % , b ) 72 % , c ) 12 % , d ) 82 % , e ) 16 %
Output (English): a