What does the Gettier problem challenge in epistemology?

What does the Gettier problem challenge in epistemology?

• A. It confirms that justified true belief is sufficient for knowledge.
• B. It claims that knowledge requires certainty.
• C. It challenges the notion that justified true belief constitutes knowledge; Gettier cases show justified true beliefs that are true by luck do not seem to be knowledge.
• D. It argues that empirical evidence alone yields knowledge.

Answer: (C)