What type of outlet boxes are required for telephones, televisions, and computers?

The correct answer is a 4" square box with a raised cover. This type of outlet box is specifically suited for the installation of devices like telephones, televisions, and computers as it provides adequate space for wiring and connections, ensuring that there is enough room to accommodate the multiple cables that are often involved with these systems. The raised cover is beneficial because it allows for the fitting of larger connectors and ensures that the connection points are accessible.

A 4" circular box, while it may serve some functions, typically does not provide as much space or accessibility for the larger devices and the variety of connections involved in multimedia setups. Similarly, a 6" square box may be more than necessary and can lead to unnecessary bulk, while a 2" circular box with a flat cover would lack the depth and capacity needed for proper installations of these electronics. Therefore, the 4" square box with a raised cover is the standard choice for ensuring proper installation and accessibility for electronic devices.