What did philosophers of the enlightenment have faith in, believing it could answer questions and solve problems? science economics human reason government authority

The correct answer is C) Human Reason.

Philosophers of the Enlightenment had faith in Human Reason, believing it could answer questions and solve problems.

The Enlightenment period is considered the Age of the Reason. European philosophers in the late 17th century or the beginning of the 18th century considered that human reason was the answer to dissipate the ignorance of the Dark Ages. Philosophers considered new alternatives of knowledge that would improve humanity such as the scientific method, liberty, and reason.  

- "the most famous structure by far at saqqara is djoser's step pyramid. dating from the 3rd dynasty (2667—2448 bc), it was the first all-stone complex ever built on earth."

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i think it was   tsar alexander ii