Answer :
Final answer:
DEF typically freezes at -11 to -12 degrees Celsius (12 to 10 degrees Fahrenheit) when it is pure.
Explanation:
The freezing point of DEF (diesel exhaust fluid) depends on the concentration of urea and water. When DEF is pure, it typically freezes at temperatures around -11 to -12 degrees Celsius, which is equivalent to 12 to 10 degrees Fahrenheit. However, the freezing point can vary slightly depending on the specific formulation of the DEF.
Therefore, based on the options provided, the correct answer would be B-12 degrees Fahrenheit.
