The correct answer is D. Fahrenheit.

Fahrenheit is a temperature scale that was created by Daniel Gabriel Fahrenheit in 1724. It is the most common temperature scale in the United States and Canada, but it is not used in most other countries. The Fahrenheit scale is based on the freezing point of water (32 degrees Fahrenheit) and the boiling point of water (212 degrees Fahrenheit).

The other options are incorrect because they are not the correct spelling of the word "Fahrenheit."