Task: Question Answering
Input (English): Problem: a furniture store owner decided to drop the price of her recliners by 20 % to spur business. by the end of the week she had sold 50 % more recliners. what is the percentage increase of the gross ?
Options: a. 10 %, b. 15 %, c. 20 %, d. 25 %, e. 50 %
Output (English): c