All of the following are valid ways to relieve the static pressure in the fuel system before removing the fuel lines EXCEPT:

A. Using fuel filter lines.

B. Removing the fuel pump relay or the fuel pump fuse and running the engine until it dies.

C. Connecting a fuel pump pressure gauge (that has a bleed valve) to the fuel rail test point and releasing the excess pressure from the system into a gas can.

D. On GDI equipped engines, using a scan tool to release the fuel pressure.

Using fuel filter lines is not a valid method for relieving static pressure in a fuel system; other listed methods such as running the engine until it stops, using a pressure gauge, or a scan tool are valid techniques.

Explanation:

The student's question pertains to methods for relieving static pressure in the fuel system before removing fuel lines to avoid fuel spray that can cause injury or fire. The methods listed to relieve pressure are:

Using fuel filter lines.
Removing the fuel pump relay or the fuel pump fuse and running the engine until it dies.
Connecting a fuel pump pressure gauge that has a bleed valve to the fuel rail test point, and releasing the excess pressure from the system into a gas can.
On GDI equipped engines, using a scan tool to release the fuel pressure.

All of these are considered valid ways to relieve pressure except for option A: using fuel filter lines. This option is not a recognized method to relieve pressure; it is more aligned with the maintenance of the fuel system rather than a method to decrease fuel system pressure.