Fahrenheit Defined 0° as the Lowest Temperature That Could Be

Multiple Choice

Fahrenheit defined 0° as the lowest temperature that could be achieved by adding salt to ice and found that ice by itself freezes at 32° on this scale. Unfortunately, Fahrenheit's measurements were wrong. The lowest temperature that can be achieved by adding salt to ice is -21.2 °C. Calculate the equivalent temperature on the Fahrenheit scale.

A) -38.2 °F
B) -11.8 °F
C) -6.2 °F
D) 20 °F
E) 32 °F