What temperature does Jet A fuel start to freeze?

Jet A fuel typically starts to freeze at a temperature around -40°C. This temperature is significant because it indicates the point at which the fuel may begin to crystallize and can lead to problems with fuel flow in certain conditions, particularly in aviation operations where temperatures can drop significantly during flight. Understanding this characteristic of Jet A fuel is crucial for ensuring safe handling and operational efficiency in colder environments.

The other options suggest temperatures that are either too low or too high compared to the actual freezing point of Jet A, making them unsuitable as correct answers.