What gave the inspiration to manufacture terrifying and modern destructive weapons?

Let's read the third sentence of the passage carefully: "इस शक्ति की युद्धकालीन सफलता ने अमेरिका, रूस, ब्रिटेन, फ्रांस, आदि सभी देशों को ऐसे शस्त्रास्त्रों के निर्माण की प्रेरणा दी कि सभी भयंकर और सर्वविनाशकारी शस्त्र बनाने लगे।" Here, "इस शक्ति की युद्धकालीन सफलता" refers to the successful wartime utilization and impact of the atom bomb (mentioned in the preceding sentence) that brought down Japan. Hence, the initial catalyst/inspiration was the sheer wartime success and power demonstration of the atomic bomb during World War II. This aligns with option (B) or (D) in general contexts, but based on the precise textual flow, it was the competitive rush triggered among these large nations by that event. Looking closely at option (B), "बड़े देशों की पारस्परिक प्रतिस्पर्धा ने" (The mutual competition of large countries), it matches the textual cause of weapon stockpiling.