Task: Question Answering
Input (English): Problem: there are two concentric circles with radii 8 and 4 . if the radius of the outer circle is increased by 25 % and the radius of the inner circle decreased by 25 % , by what percent does the area between the circles increase ? 
Options: a ) 75 , b ) 80 , c ) 85 , d ) 90 , e ) 95
Output (English): d