What Did Kepler,a Deeply Mystical Investigator,believe About the Study of Nature

What did Kepler,a deeply mystical investigator,believe about the study of nature?

A) The language of nature was mathematics,and humankind had a religious duty to learn what it said.
B) Copernicus was wrong about the orbits of planets,so the Ptolemaic model must be correct.
C) Very little data was needed to understand nature.
D) Mathematics was only the first step,and real truth came from the occult sciences.
E) Nature was an incredibly complex system that God alone could comprehend.