Task: Question Answering
Input (English): Problem: when positive integer n is divided by 2 , the remainder is 1 . when n is divided by 7 , the remainder is 5 . what is the smallest positive integer p , such that ( n + p ) is a multiple of 10 ? 
Options: a ) 1 , b ) 2 , c ) 5 , d ) 19 , e ) 20
Output (English): c