Task: Question Answering
Input (English): Problem: in a quiz the points in each round for the first , second , third and fourth position were 10050 , 2010 . no other points were given . rachel participated in several rounds in the competition and the product of her score was 10000 . in how many rounds did she participate ? 
Options: a ) 2 , b ) can not be determined , c ) 4 , d ) 6 , e ) 10
Output (English): b