In what manner does the DFC differ from the MFC regarding VSV actions?

The correct choice emphasizes that the Digital Fuel Control (DFC) uses engine oil instead of fuel for Variable Stator Vane (VSV) actions. In gas turbine systems, the DFC enhances the engine's ability to control various parameters by utilizing engine oil to manipulate the VSVs. This method allows for precise adjustments in the compressor section of the turbine, which is crucial for optimizing performance and efficiency under different operational conditions.

This differs fundamentally from the Mechanical Fuel Control (MFC), which typically relies on fuel for similar actions. The use of engine oil in the DFC provides certain advantages, such as better responsiveness and the ability to operate under a wider range of conditions without the risk of fuel vapors affecting mechanical components.

In terms of operational temperature, both control systems can operate within the necessary thermal ranges dictated by engine performance, so this point of the correct choice does not apply. Additionally, while the DFC may have a more sophisticated electronic control logic compared to the MFC, this is not directly related to the fuel flow path complexity, making this distinction irrelevant in evaluating their operational differences concerning VSV actions.