Task: Question Answering
Input (English): Problem: on day one , a store sold 96 pens . on each of the next d days , the company sold 44 pens . if the average daily sales of pens over this time period ( including day one ) is 48 pens , what is the value of d ? 
Options: a ) 9 , b ) 10 , c ) 11 , d ) 12 , e ) 13
Output (English): d