Task: Question Answering
Input (English): Problem: the area of a circle is added to its diameter , and the circumference is then subtracted from this total , the result is 10 . what is the radius of the circle ? 
Options: ['a ) 2 * pi', 'b ) pi', 'c ) 2', 'd ) 4 * pi', 'e ) 4']
Output (English): e