Task: Question Answering
Input (English): Problem: the contents of a certain box consist of 40 apples and 30 oranges . how many oranges must be added to the box so that exactly 40 % of the pieces of fruit in the box will be apples ? 
Options: a ) 40 , b ) 50 , c ) 60 , d ) 70 , e ) 30
Output (English): e