The correct answer is: A. genuine.
Machine-civilization has made human life artificial in the sense that it has made us more reliant on machines and less on our own natural abilities. We now use machines to do many things that we used to do for ourselves, such as cooking, cleaning, and even driving. This has made us less self-sufficient and more dependent on technology.
However, it is important to note that machine-civilization has also made human life more convenient and efficient. We can now do many things that were once impossible or very difficult, such as communicating with people all over the world, accessing information instantly, and even traveling to space.
Overall, machine-civilization has had a mixed impact on human life. It has made us more artificial in some ways, but it has also made our lives more convenient and efficient.
Option B, natural, is incorrect because machine-civilization is not a natural phenomenon. It is a human-made phenomenon.
Option C, true, is incorrect because machine-civilization is not necessarily true. It is a matter of opinion whether or not machine-civilization is a good thing or a bad thing.
Option D, authentic, is incorrect because machine-civilization is not necessarily authentic. It is a matter of opinion whether or not machine-civilization is a genuine expression of human creativity or a mere imitation of nature.