Given the task definition, example input & output, solve the new input case.
In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.
Example: This list contains the top 25 accounts with the most followers on the social photo-sharing platform Instagram. As of May 2018, the most followed user is Instagram's own account, with over 235 million followers. Selena Gomez is the most followed individual, with over 137 million followers. Ten accounts have exceeded 100 million followers on the site.
Output: who has the maximum number of followers on instagram
The answer is talking about the Instagram accounts that have the most followers. The question asking about the maximum number of followers. So this is a good example.

New input case for you: A cashback reward program is an incentive program operated by credit card companies where a percentage of the amount spent is paid back to the card holder. Many credit card issuers, particularly those in the United Kingdom and United States, run programs to encourage use of the card where the card holder is given points, frequent flyer miles or a monetary amount. This last benefit, a monetary amount, is usually known as cashback or cash back reward.
Output:
what are cash back rewards on credit cards