Task: Question Answering
Input (English): Problem: a boy multiplied 987 by a certain number and obtained 559981 as his answer . if in the answer both 9 are wrong and the other digits are correct , then the correct answer would be : 
Options: a ) 553681 , b ) 555181 , c ) 555681 , d ) 556581 , e ) 556881
Output (English): c