Which represents the author's purpose in saying, "dare to know! (sapere aude) "?

a. to define the nature of the enlightenment erab. to suggest the role of defiance in starting a revolutionc. to encourage individuals to seek enlightenmentd. to explain why individuals should seek enlightenment?

I would say the correct answer is C. to encourage individuals to seek Enlightenment.

Dare to know is pretty much the motto of the entire era of Enlightenment - it was a time when people wanted to be more educated, and to learn more about the world. The author who coined this phrase is Horace, and he wanted people to not be afraid of taking chances and becoming better people.