Answer:
C.) The Enlightenment introduced many political ideas that are still relevant today.
Step-by-step explanation:
Many of those ideas such as freedom of speech, freedom of religion, etc are political ideas that are still well-kept, well-respected, and understood today. The rest of the answers do not accurately describe the main idea of the ENTIRE passage, and often just highlight one part (ex. the fact of The Enlightenment starting in Europe in the 18th century) instead of creating summary that would accurately "describe the passage's main idea."