which one?

Which two sentences from the passage does the author use to develop the primary claim? A "They even worked together at a local restaurant, bussing tables and washing dishes." (paragraph 1) "When Mike sat down with the sales associate, he had no trouble securing a low-rate car loan with a modest down payment." (paragraph 2) "Using a special credit-history-based equation, credit bureaus determine your credit score, which is basically anestimation of haw likely you are to repay borrowed moneywhether it be credit card debt, an auto loan, or your phone bill." (paragraph 6) "It's important to know that if you always pay only the minimum payment on a credit card, it will take many years to pay off even a small balance." (paragraph 7) "If you happen to reach your credit limit without your knowledge, your transaction will be declined when you try to make a purchase, and your credit score will remain unharmed.\" (paragraph 8)