In this task, you're given an article and an answer. Your task is to generate the question for the answer based on the given article.

Let me give you an example: Article: There are a lot of public libraries in Britain. These libraries have more than one hundred and fifteen million books, not including those libraries of public schools. Public libraries not only lend books, music records but also help children, patients in hospitals and others to get special play readings, film shows and so on. The first public libraries were founded in about the year 1850. Today's public libraries usually have a reading-room, a lending room and a reference room. The greatest and most famous library in Britain is that of the British Library in London. It was founded in 1973 and has over 10, 000, 000 books. It has nearly every magazine, newspaper and book published in Britain and other parts across the world.
Answer: 10,000,000 or less.
The answer to this example can be: How many books are there in the British Library?
Here is why: In the Article, 10,000,000 is mentioned for the number of books available in the British Library, so this is a good question.

OK. solve this:
Article: Most Americans receive at least two or three credit card applications in the mail every month.Why have credit cards become so popular? For a merchant, the answer is obvious.By putting charge slips in a bank, the merchant can change credit card sales into cash.In return for processing the merchant's credit card transactions , the bank charges a fee that ranges between 1.5 and 5 percent. The easiest way to establish credit is to open checking and savings accounts at your local bank.Then apply for a gasoline or store credit card.These cards are fairly easy to get because retailers want you to buy their goods and services.The third step, and the most dangerous one, is obtaining a major credit card like Visa, MasterCard, or American Express. It is important to choose a credit card carefully because terms and conditions vary widely.Annual fees range from $15 to $75 a year, but some credit card companies charge no annual fee at all.If you will be one of the growing number of people who don't pay off their credit card debts in full each month, look for the card with the lowest interest rate.Interest rates generally range from 12 to 18 percent, though it is possible to find cards with lower rates. A credit card can be your friend because it can get you through unexpected emergencies.And if there is a problem with the products or service you purchase with your credit card, you have an opportunity to hold back payment by asking the credit card company to "charge back" to the retailer until the argument is settled.Monthly credit card statements can also help you keep your records in order.Finally, if you make payments on time, the card helps you to establish a good credit history. A credit card can be your enemy because it is an invitation to purchase items you really do not need.The credit card companies' continuous offers of minimum payments, cash advances, and even months without payments may seem like a way to skate through a money crisis.In reality, your finance charges and fees only increase, and you go deeper into debt. If you do find yourself in trouble, do not ignore the bills.Contact your creditors to explain your problem and express your desire to pay down your card balance.If that fails, a nonprofit organization like Consumer Credit Counseling Service can assist you in getting back on your financial feet.
Answer: By mailing the customer's credit card to the bank.
Answer:
How does the merchant change credit card sales into cash ?