Task: Question Answering
Input (English): Problem: there are 8 stores in town that had a total of 23 visitors on a particular day . however , only 12 people went shopping that day ; some people visited more than one store . if 8 people visited exactly two stores each , and everyone visited at least one store , what is the largest number of stores anyone could have visited ? 
Options: a ) 2 , b ) 3 , c ) 4 , d ) 5 , e ) 6
Output (English): c