Task: Question Answering
Input (English): Problem: of the families in city x in 1991 , 60 percent owned a personal computer . the number of families in city x owning a computer in 1993 was 20 percent greater than it was in 1991 , and the total number of families in city x was 9 percent greater in 1993 than it was in 1991 . what percent of the families in city x owned a personal computer in 1993 ? 
Options: a ) 59 % , b ) 55 % , c ) 63 % , d ) 66 % , e ) 68 %
Output (English): d