Which best describes the enlightenment?
a. it challenged old ways of thinking.
b. it strongly opposed slavery.
c. it promoted traditional values.
d. it embraced and promoted religion.

The correct answer is A. It challenged old ways of thinking.

Explanation

The illustration or Enlightenment was a European intellectual movement that originated after the middle ages, this movement focused on human thought, reason and scientific explanation. This meant important changes because, during the middle ages, there was a tendency to argue everything based on religion and God and during the Enlightenment science and logic prevailed. Additionally, during this period scientific research methods and advances in science originated, religion became less important, and this movement reached other continents such as America after it expanded in Europe. So, the correct answer is A. It challenged old ways of thinking.