It would be the fourth option hope this helps
<span>D. a way of producing goods that eliminates human labor and relies on machines</span>
Answer:
see below
Explanation:
It can change the meaning when one goes back and understands the time, place, and perspective from when the book was originally written.
Are is the correct answer. Was would be past tense and therefore would need travelled. Is doesn't work for plurals so therefore it must be are
