AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
(B) It relied on weapons such as machine guns, tanks, aircraft and chemical weapons produced by large-scale industry.
The textbook explicitly states: "This war was thus the first modern industrial war. It saw the use of machine guns, tanks, aircraft, chemical weapons, etc. on a massive scale. These were all increasingly products of modern large-scale industry." Option B directly mirrors this explanation. The word "industrial" in the label refers to how the weapons were made and deployed — through large-scale industrial production — not to duration, colonial recruitment, or power blocs.