Answer: An era in which most of the computer-art-work centered around computer programming. (Option C)
Explanation:
Multimedia is defined as a multiple means of communication. Multimedia is a combination of multiple forms of media useful to communicate which includes text, audio, video, graphics and animation. So, a multimedia era refers to the era in which all these forms of communications were made using computer programming.
In addition to that multimedia can be interactive when it allows people to generate computer command.