1. According to the article, Enlightenment thinkers valued drawing one's own conclusions based on objective observations of the world around them.
Which selection from the article BEST supports the idea outlined above?
A:In the span of three years, the physicist Isaac Newton published his "Principia Mathematica" (1686) and the philosopher John
Locke published his "Essay Concerning Human Understanding" (1689). These two works provided the scientific, mathematical and
philosophical toolkit for the Enlightenment's major advances.

B:This period also saw many discoveries in astronomy and mathematics thanks to the leaders of the Scientific Revolution, Galileo
Galilei, Johannes Kepler and Gottfried Leibniz. The Scientific Revolution was a period that started before the Enlightenment and
laid the groundwork for modern science.

C:Locke argued that human nature was changeable. He also argued that knowledge was gained through accumulated experience
rather than by accessing some sort of outside truth. Newton's calculus and optical (the science of light and seeing) theories
provided the powerful Enlightenment metaphors for precisely measured change and illumination.

D:The changes that came about were part of a movement called the Age of Reason, or simply the Enlightenment. Enlightenment
thinkers in Britain, France and the rest of Europe questioned traditional authority and embraced the notion that humanity could
be improved through change based on reason.