The dull thud of the gas-shells mingles with the crashes of the light explosives. A bell sounds between the explosions, gongs, and metal clappers warning everyone-Gas-Gas-Gaas. These first minutes with the mask decide between life and death: is it air tight? I remember the awful sights in the hospital: the gas patients who lay in day-long suffocation cough up their burnt lungs in clots. Cautiously, the mouth applied to the valve, I breathe. The gas still creeps over the ground. .. like a big, soft jelly-fish…… Inside the gas-mask my head booms and roars-it is nigh bursting. My lungs are tight, they breathe always the same hot, used up air, and the veins on my temple are swollen. I feel I am suffocating. – The excerpt above shows evidence of which type of warfare: A.
Formation Warfare Shelling Warfare

B.
Gas warfare and Trench warfare

C.
All Answers are correct

D.
Guerilla Warfare and Drone Warfare