Which of the following is a method for paying bills electronically?

The correct answer relates to using technology to facilitate bill payments electronically, which includes sending electronic instructions via personal computers or telephones. This method allows for convenient and immediate transactions without the need for physical preparation of payments like checks or cash.

Utilizing PCs or telephones to send electronic instructions streamlines the payment process, enabling users to authorize payments or set up recurring transactions online. This approach often leverages secure online banking platforms or mobile payment applications, making it a popular choice for individuals and businesses looking for speed and efficiency in managing their finances.

The other payment methods mentioned do not qualify as electronic bill payment. Using cash at the point of sale involves physical currency and does not utilize any electronic mechanisms. Conducting wire transfers via a bank is a form of electronic payment but is typically used for larger sums and sometimes lacks the convenience and immediacy of billing systems designed for regular payments, such as utilities or subscriptions. Writing paper checks and mailing them clearly represents traditional, non-electronic forms of payment that require physical handling.