Pulling up the APU fire warning switch:
A.A.Discharges the APU fire extinguisher
B.B.Discharges the APU fire extinguisher and shuts down the APU
C.C.Discharges the APU fire extinguisher and closes the bleed air valve
D.D.Trips the generator control relay and breaker, arms the associated extinguisher and closes the bleed air valve, closes the fuel shutoff valve, and the APU inlet door.
正确答案是D