Which of the following are devices for sending and receiving printed documents over telephone lines? Scanners Fax machines Wi-FI Copiers

The correct answer is: Fax machines.<br /><br />Fax machines are devices that are used to send and receive printed documents over telephone lines. They work by scanning the document to be sent, converting it into a bitmap, and then transmitting the bitmap over the phone line to another fax machine, which then reconstructs the bitmap and prints the original document. Scanners are devices that are used to convert physical documents into digital format, but they do not send or receive documents over telephone lines. Wi-Fi is a technology that allows devices to connect to the internet or to each other wirelessly, but it is not a device for sending and receiving printed documents. Copiers are devices that are used to make copies of documents, but they do not send or receive documents over telephone lines.