René Descartes made his speculations about reflexes shortly after __________.
A) Darwin published his own speculations about the origin of species and the U.S. Civil War (1850s)
B) Freud had popularized his ideas about the unconscious and World War I (1910s)
C) Marco Polo traveled to China (about 1300)
D) Kepler and Galileo developed ideas about the movements of planets (1600s)

Question

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René Descartes made his speculations about reflexes in the 1600s, shortly after Kepler and Galileo developed their ideas about the movements of planets.

René Descartes Made His Speculations About Reflexes Shortly After __________