The correct spelling is "COUNTERFEIT," which means something that is made to look like another thing with the intent to deceive. Other options have typographical errors:
- "COUNTERFIAT" is incorrect due to the wrong spelling of "FIAT."
- "CONTOURFIET" is incorrect and does not correspond to the correct word.
- "COUNTERFIET" also has an incorrect spelling of "FIET."
Thus, the correct answer is (C).