I think the answer is B. Distribution of resources
Most likely A. The use of powerful weapons like the atomic bomb increased the percentage of civilian casualties. I would’ve said D. But aerial combat was actually introduced in ww I
Answer:
Artificial intelligence such as Robots
Explanation:
In 18th century, slavery was at peak value since there was high need of labour.
In 20th century, scientists have created robots which has replaced slaves hence slavery decayed.
