As for this problem, the most probable and the most likely answer among the presented options in this would be D. Technology
Any tool that helps make our physical and mental processes more efficient can be referred to as technology. Computers are currently at the very top of the technological advancement disregarding the different types and forms that it has taken for it to be specialized and serve a purpose. Mechanisms, on the other hand, are more on the inner workings of these technologies. Media would be more on to the dissemination of the information and communication.
