Which of the following are considered input devices?

The correct choice identifies that all listed items are considered input devices. In the context of computer systems, input devices are peripherals used to provide data and control signals to a computer system. Examples of common input devices include keyboards, mice, scanners, and microphones, among others.

When all items in the given set are considered to be input devices, it implies that each item plays a role in facilitating user interaction with the computer, sending commands or data for processing. Understanding the functionality of input devices is crucial in recognizing how data is captured and translated into digital signals that a computer system can process.

In a typical grouping of devices, options that only include certain items would imply that others do not contribute to data input, which would reflect an incomplete understanding of device functionality. For a comprehensive grasp of how computers operate and process inputs, it is essential to acknowledge all relevant devices that facilitate input, hence making the selection that includes all items correct.