We know from historical records that The Spirit of the Laws by Baron de Montesquieu was placed on the Index of Forbidden Books by the Catholic Church. Which of the following can one reasonably infer from this fact?

a The Enlightenment challenged the traditional authority of the Church.
b The Enlightenment called for equality of opportunity for women.
c Enlightenment thinkers published a series of lengthy encyclopedias.
d Enlightenment thinkers called for the overthrow of governments.