In the event of an act of unlawful interference, which of the following is the correct procedure to be taken by the pilot in command?
a. Squawk 7700 if the situation requires and continue the flight as per the ATC clearance received if possible
b. Squawk 7500 and broadcast a warning to ATC other traffic on 121.500MHz or the frequency in use whilst maintaining the flight as cleared
c. Squawk 7500 (or 7700 if required) and broadcast a warning if the situation forces deviation from the cleared flight plan
d. If forced to deviate from the flight plan, climb or descend to altitudes that differ from the normal cruising altitudes by 1000ft
a. Squawk 7700 if the situation requires and continue the flight as per the ATC clearance received if possible
b. Squawk 7500 and broadcast a warning to ATC other traffic on 121.500MHz or the frequency in use whilst maintaining the flight as cleared
c. Squawk 7500 (or 7700 if required) and broadcast a warning if the situation forces deviation from the cleared flight plan
d. If forced to deviate from the flight plan, climb or descend to altitudes that differ from the normal cruising altitudes by 1000ft