Answer :
The unit with the smallest degree is the Fahrenheit degree, as it is 1.8 times smaller (a) than both a Celsius degree and a kelvin.
The answer to which degree system has the smallest unit is C. one Fahrenheit degree.
The Fahrenheit scale places the boiling and freezing points of water exactly 180 degrees apart.
Since 100 Celsius degrees cover the same range, one degree on the Celsius scale is 1.8 times larger, or
180/100 = 9/5.
Simultaneously, since the size of a degree Celsius and a kelvin are the same, both are 1.8 times larger than a degree Fahrenheit.
Therefore, a single degree on the Fahrenheit scale is smaller (a) than a degree on both the Celsius and Kelvin scales.
