Benny gets a job at a law firm with a salary of $70,000 per year. after the first year, his salary increases to $73,000. over the next five years, he gets an increase of $3,000 every year.

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.