Many historians consider the printing press as the most important invention in history because from its creation it allowed the development and expansion of knowledge through the printing of books. Until that moment, knowledge, science and other theories that generated technological, economic, political and social development could not be broadly transmitted, because the books were written by hand by the monks, who exercised a kind of censorship over any question that was against religious principles.
For this reason, the printing press removed the monopoly on knowledge from religion, while increasing the ease of transmitting said knowledge, exponentially increasing the speed of human development.
The best and most correct answer among the choices provided by the question is the second choice "China"
U.S. President Richard Nixon<span>'s </span>1972<span> visit to the People's Republic of China was an important step in formally </span>normalizing relations<span> between the United States and China.</span>
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<span>Copernicus posited a heliocentric or sun-centered conception of the universe; Kepler contributed the three laws of planetary motion; and Galileo's telescope led to observations of earth like planets rather than ethereal planets.</span>